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Fix mixed Python dump of a new and a closed study
[modules/smesh.git] / src / SMESH_I / SMESH_Gen_i.cxx
index 2e11e27e580236fa7145fa8da347eea2a65ae923..e6ebe05e91a43b03b87159ff1fbf7cdd2afd3ffd 100644 (file)
@@ -85,7 +85,6 @@
 #include "MED_Factory.hxx"
 #include "SMDS_EdgePosition.hxx"
 #include "SMDS_FacePosition.hxx"
-#include "SMDS_PolyhedralVolumeOfNodes.hxx"
 #include "SMDS_SetIterator.hxx"
 #include "SMDS_SpacePosition.hxx"
 #include "SMDS_VertexPosition.hxx"
 
 #include <map>
 #include <fstream>
+#include <sstream>
 #include <cstdio>
 #include <cstdlib>
 
@@ -314,7 +314,10 @@ SMESH_Gen_i::SMESH_Gen_i( CORBA::ORB_ptr            orb,
   _thisObj = this ;
   _id = myPoa->activate_object( _thisObj );
 
+  myStudyContext = new StudyContext;
+
   myIsEmbeddedMode = false;
+  myIsEnablePublish = true;
   myShapeReader = NULL;  // shape reader
   mySMESHGen = this;
   myIsHistoricalPythonDump = true;
@@ -372,11 +375,8 @@ SMESH_Gen_i::~SMESH_Gen_i()
   myHypCreatorMap.clear();
 
   // Clear study contexts data
-  map<int, StudyContext*>::iterator it;
-  for ( it = myStudyContextMap.begin(); it != myStudyContextMap.end(); ++it ) {
-    delete it->second;
-  }
-  myStudyContextMap.clear();
+  delete myStudyContext;
+
   // delete shape reader
   if ( myShapeReader )
     delete myShapeReader;
@@ -501,7 +501,7 @@ SMESH::SMESH_Hypothesis_ptr SMESH_Gen_i::createHypothesis(const char* theHypName
     getHypothesisCreator(theHypName, theLibName, aPlatformLibName);
 
   // create a new hypothesis object, store its ref. in studyContext
-  myHypothesis_i = aCreator->Create(myPoa, GetCurrentStudyID(), &myGen);
+  myHypothesis_i = aCreator->Create(myPoa, &myGen);
   if (myHypothesis_i)
   {
     myHypothesis_i->SetLibName( aPlatformLibName.c_str() ); // for persistency assurance
@@ -533,10 +533,10 @@ SMESH::SMESH_Mesh_ptr SMESH_Gen_i::createMesh()
   // Get or create the GEOM_Client instance
   try {
     // create a new mesh object servant, store it in a map in study context
-    SMESH_Mesh_i* meshServant = new SMESH_Mesh_i( GetPOA(), this, GetCurrentStudyID() );
+    SMESH_Mesh_i* meshServant = new SMESH_Mesh_i( GetPOA(), this );
     // create a new mesh object
     if(MYDEBUG) MESSAGE("myIsEmbeddedMode " << myIsEmbeddedMode);
-    meshServant->SetImpl( myGen.CreateMesh( GetCurrentStudyID(), myIsEmbeddedMode ));
+    meshServant->SetImpl( myGen.CreateMesh( myIsEmbeddedMode ));
 
     // activate the CORBA servant of Mesh
     SMESH::SMESH_Mesh_var mesh = SMESH::SMESH_Mesh::_narrow( meshServant->_this() );
@@ -630,85 +630,74 @@ CORBA::Boolean SMESH_Gen_i::IsEmbeddedMode()
 
 //=============================================================================
 /*!
- *  SMESH_Gen_i::SetCurrentStudy
+ *  SMESH_Gen_i::SetEnablePublish
  *
- *  Set current study
+ *  Set enable publishing in the study
  */
 //=============================================================================
-
-void SMESH_Gen_i::SetCurrentStudy( SALOMEDS::Study_ptr theStudy )
+void SMESH_Gen_i::SetEnablePublish( CORBA::Boolean theIsEnablePublish )
 {
-  setCurrentStudy( theStudy );
+  myIsEnablePublish = theIsEnablePublish;
 }
 
-void SMESH_Gen_i::setCurrentStudy( SALOMEDS::Study_ptr theStudy,
-                                   bool                theStudyIsBeingClosed)
+//=============================================================================
+/*!
+ *  SMESH_Gen_i::IsEnablePublish
+ *
+ *  Check enable publishing
+ */
+//=============================================================================
+
+CORBA::Boolean SMESH_Gen_i::IsEnablePublish()
 {
-  int curStudyId = GetCurrentStudyID();
-  MESSAGE("curStudyId " << curStudyId);
-  myCurrentStudy = SALOMEDS::Study::_duplicate( theStudy );
-  // create study context, if it doesn't exist and set current study
-  int studyId = GetCurrentStudyID();
-  MESSAGE("studyId " << studyId);
-  if ( myStudyContextMap.find( studyId ) == myStudyContextMap.end() )
-    myStudyContextMap[ studyId ] = new StudyContext;
-
-  // myCurrentStudy may be nil
-  if ( !theStudyIsBeingClosed && !CORBA::is_nil( myCurrentStudy ) ) {
-    SALOMEDS::StudyBuilder_var aStudyBuilder = myCurrentStudy->NewBuilder();
-    SALOMEDS::SComponent_wrap GEOM_var = myCurrentStudy->FindComponent( "GEOM" );
-    if( !GEOM_var->_is_nil() )
-      aStudyBuilder->LoadWith( GEOM_var, GetGeomEngine() );
-    // NPAL16168, issue 0020210
-    // Let meshes update their data depending on GEOM groups that could change
-    if ( curStudyId != studyId )
-    {
-      MESSAGE("curStudyId " << curStudyId << " studyId " << studyId);
-      CORBA::String_var compDataType = ComponentDataType();
-      SALOMEDS::SComponent_wrap me = myCurrentStudy->FindComponent( compDataType.in() );
-      if ( !me->_is_nil() ) {
-        SALOMEDS::ChildIterator_wrap anIter = myCurrentStudy->NewChildIterator( me );
-        for ( ; anIter->More(); anIter->Next() ) {
-          SALOMEDS::SObject_wrap so = anIter->Value();
-          CORBA::Object_var     ior = SObjectToObject( so );
-          if ( SMESH_Mesh_i*   mesh = SMESH::DownCast<SMESH_Mesh_i*>( ior ))
-            mesh->CheckGeomModif();
-        }
-      }
-    }
-  }
+  return myIsEnablePublish;
 }
 
 //=============================================================================
 /*!
- *  SMESH_Gen_i::GetCurrentStudy
+ *  SMESH_Gen_i::UpdateStudy
  *
- *  Get current study
+ *  Update study (needed at switching GEOM->SMESH)
  */
 //=============================================================================
 
-SALOMEDS::Study_ptr SMESH_Gen_i::GetCurrentStudy()
+void SMESH_Gen_i::UpdateStudy()
 {
-  if(MYDEBUG) MESSAGE( "SMESH_Gen_i::GetCurrentStudy: study Id = " << GetCurrentStudyID() );
-  if ( GetCurrentStudyID() < 0 )
-    return SALOMEDS::Study::_nil();
-  return SALOMEDS::Study::_duplicate( myCurrentStudy );
+  if ( !myStudyContext )
+    myStudyContext = new StudyContext;
+
+  SALOMEDS::Study_var aStudy = getStudyServant();
+  if ( !CORBA::is_nil( aStudy ) ) {
+    SALOMEDS::StudyBuilder_var aStudyBuilder = aStudy->NewBuilder();
+    SALOMEDS::SComponent_wrap GEOM_var = aStudy->FindComponent( "GEOM" );
+    if( !GEOM_var->_is_nil() )
+      aStudyBuilder->LoadWith( GEOM_var, GetGeomEngine() );
+    // NPAL16168, issue 0020210
+    // Let meshes update their data depending on GEOM groups that could change
+    CORBA::String_var compDataType = ComponentDataType();
+    SALOMEDS::SComponent_wrap me = aStudy->FindComponent( compDataType.in() );
+    if ( !me->_is_nil() ) {
+      SALOMEDS::ChildIterator_wrap anIter = aStudy->NewChildIterator( me );
+      for ( ; anIter->More(); anIter->Next() ) {
+        SALOMEDS::SObject_wrap so = anIter->Value();
+        CORBA::Object_var     ior = SObjectToObject( so );
+        if ( SMESH_Mesh_i*   mesh = SMESH::DownCast<SMESH_Mesh_i*>( ior ))
+          mesh->CheckGeomModif();
+      }
+    }
+  }
 }
 
 //=============================================================================
 /*!
- *  SMESH_Gen_i::GetCurrentStudyContext
+ *  SMESH_Gen_i::GetStudyContext
  *
- *  Get current study context
+ *  Get study context
  */
 //=============================================================================
-StudyContext* SMESH_Gen_i::GetCurrentStudyContext()
+StudyContext* SMESH_Gen_i::GetStudyContext()
 {
-  if ( !CORBA::is_nil( myCurrentStudy ) &&
-       myStudyContextMap.find( GetCurrentStudyID() ) != myStudyContextMap.end() )
-    return myStudyContextMap[ myCurrentStudy->StudyId() ];
-  else
-    return 0;
+  return myStudyContext;
 }
 
 //=============================================================================
@@ -729,7 +718,7 @@ SMESH::SMESH_Hypothesis_ptr SMESH_Gen_i::CreateHypothesis( const char* theHypNam
 
   // Publish hypothesis/algorithm in the study
   if ( CanPublishInStudy( hyp ) ) {
-    SALOMEDS::SObject_wrap aSO = PublishHypothesis( myCurrentStudy, hyp );
+    SALOMEDS::SObject_wrap aSO = PublishHypothesis( hyp );
     if ( !aSO->_is_nil() ) {
       // Update Python script
       TPythonDump() << aSO << " = " << this << ".CreateHypothesis('"
@@ -854,12 +843,12 @@ CORBA::Boolean SMESH_Gen_i::GetSoleSubMeshUsingHyp( SMESH::SMESH_Hypothesis_ptr
                                                     SMESH::SMESH_Mesh_out       theMesh,
                                                     GEOM::GEOM_Object_out       theShape)
 {
-  if ( GetCurrentStudyID() < 0 || CORBA::is_nil( theHyp ))
+  if ( CORBA::is_nil( theHyp ))
     return false;
 
   // get Mesh component SO
   CORBA::String_var compDataType = ComponentDataType();
-  SALOMEDS::SComponent_wrap comp = myCurrentStudy->FindComponent( compDataType.in() );
+  SALOMEDS::SComponent_wrap comp = getStudyServant()->FindComponent( compDataType.in() );
   if ( CORBA::is_nil( comp ))
     return false;
 
@@ -867,7 +856,7 @@ CORBA::Boolean SMESH_Gen_i::GetSoleSubMeshUsingHyp( SMESH::SMESH_Hypothesis_ptr
   SMESH::SMESH_Mesh_var foundMesh;
   TopoDS_Shape          foundShape;
   bool                  isSole = true;
-  SALOMEDS::ChildIterator_wrap meshIter = myCurrentStudy->NewChildIterator( comp );
+  SALOMEDS::ChildIterator_wrap meshIter = getStudyServant()->NewChildIterator( comp );
   for ( ; meshIter->More() && isSole; meshIter->Next() )
   {
     SALOMEDS::SObject_wrap curSO = meshIter->Value();
@@ -1073,9 +1062,9 @@ SMESH::SMESH_Mesh_ptr SMESH_Gen_i::CreateMesh( GEOM::GEOM_Object_ptr theShapeObj
 
   // publish mesh in the study
   if ( CanPublishInStudy( mesh ) ) {
-    SALOMEDS::StudyBuilder_var aStudyBuilder = myCurrentStudy->NewBuilder();
+    SALOMEDS::StudyBuilder_var aStudyBuilder = getStudyServant()->NewBuilder();
     aStudyBuilder->NewCommand();  // There is a transaction
-    SALOMEDS::SObject_wrap aSO = PublishMesh( myCurrentStudy, mesh.in() );
+    SALOMEDS::SObject_wrap aSO = PublishMesh( mesh.in() );
     aStudyBuilder->CommitCommand();
     if ( !aSO->_is_nil() ) {
       // Update Python script
@@ -1104,9 +1093,9 @@ SMESH::SMESH_Mesh_ptr SMESH_Gen_i::CreateEmptyMesh()
 
   // publish mesh in the study
   if ( CanPublishInStudy( mesh ) ) {
-    SALOMEDS::StudyBuilder_var aStudyBuilder = myCurrentStudy->NewBuilder();
+    SALOMEDS::StudyBuilder_var aStudyBuilder = getStudyServant()->NewBuilder();
     aStudyBuilder->NewCommand();  // There is a transaction
-    SALOMEDS::SObject_wrap aSO = PublishMesh( myCurrentStudy, mesh.in() );
+    SALOMEDS::SObject_wrap aSO = PublishMesh( mesh.in() );
     aStudyBuilder->CommitCommand();
     if ( !aSO->_is_nil() ) {
       // Update Python script
@@ -1159,9 +1148,9 @@ SMESH::SMESH_Mesh_ptr SMESH_Gen_i::CreateMeshesFromUNV( const char* theFileName
   string aFileName;
   // publish mesh in the study
   if ( CanPublishInStudy( aMesh ) ) {
-    SALOMEDS::StudyBuilder_var aStudyBuilder = myCurrentStudy->NewBuilder();
+    SALOMEDS::StudyBuilder_var aStudyBuilder = getStudyServant()->NewBuilder();
     aStudyBuilder->NewCommand();  // There is a transaction
-    SALOMEDS::SObject_wrap aSO = PublishMesh( myCurrentStudy, aMesh.in(), aFileName.c_str() );
+    SALOMEDS::SObject_wrap aSO = PublishMesh( aMesh.in(), aFileName.c_str() );
     aStudyBuilder->CommitCommand();
     if ( !aSO->_is_nil() ) {
       // Update Python script
@@ -1217,11 +1206,9 @@ SMESH::mesh_array* SMESH_Gen_i::CreateMeshesFromMEDorSAUV( const char* theFileNa
 
   if (theStatus == SMESH::DRS_OK) {
     SALOMEDS::StudyBuilder_var aStudyBuilder;
-    if ( GetCurrentStudyID() > -1 )
-    {
-      aStudyBuilder = myCurrentStudy->NewBuilder();
-      aStudyBuilder->NewCommand();  // There is a transaction
-    }
+    aStudyBuilder = getStudyServant()->NewBuilder();
+    aStudyBuilder->NewCommand();  // There is a transaction
+
     aResult->length( aNames.size() );
     int i = 0;
 
@@ -1240,7 +1227,7 @@ SMESH::mesh_array* SMESH_Gen_i::CreateMeshesFromMEDorSAUV( const char* theFileNa
         // little trick: for MED file theFileName and theFileNameForPython are the same, but they are different for SAUV
         // - as names of meshes are stored in MED file, we use them for data publishing
         // - as mesh name is not stored in UNV file, we use file name as name of mesh when publishing data
-        aSO = PublishMesh( myCurrentStudy, mesh.in(), ( theFileName == theFileNameForPython ) ? (*it).c_str() : aFileName.c_str() );
+        aSO = PublishMesh( mesh.in(), ( theFileName == theFileNameForPython ) ? (*it).c_str() : aFileName.c_str() );
 
       // Python Dump
       if ( !aSO->_is_nil() ) {
@@ -1307,7 +1294,7 @@ SMESH::mesh_array* SMESH_Gen_i::CreateMeshesFromSAUV( const char* theFileName,
 #ifdef WIN32
   cmd = "%PYTHONBIN% ";
 #else
-  cmd = "python ";
+  cmd = "python3 ";
 #endif
   cmd += "-c \"";
   cmd += "from medutilities import convert ; convert(r'" + sauvfilename + "', 'GIBI', 'MED', 1, r'" + medfilename + "')";
@@ -1317,7 +1304,7 @@ SMESH::mesh_array* SMESH_Gen_i::CreateMeshesFromSAUV( const char* theFileName,
 #ifdef WIN32
   cmd = "%PYTHONBIN% ";
 #else
-  cmd = "python ";
+  cmd = "python3 ";
 #endif
   cmd += "-c \"";
   cmd += "from medutilities import my_remove ; my_remove(r'" + medfilename + "')";
@@ -1351,10 +1338,9 @@ SMESH::SMESH_Mesh_ptr SMESH_Gen_i::CreateMeshesFromSTL( const char* theFileName
 #endif
   // publish mesh in the study
   if ( CanPublishInStudy( aMesh ) ) {
-    SALOMEDS::StudyBuilder_var aStudyBuilder = myCurrentStudy->NewBuilder();
+    SALOMEDS::StudyBuilder_var aStudyBuilder = getStudyServant()->NewBuilder();
     aStudyBuilder->NewCommand();  // There is a transaction
-    SALOMEDS::SObject_wrap aSO = PublishInStudy
-      ( myCurrentStudy, SALOMEDS::SObject::_nil(), aMesh.in(), aFileName.c_str() );
+    SALOMEDS::SObject_wrap aSO = PublishInStudy( SALOMEDS::SObject::_nil(), aMesh.in(), aFileName.c_str() );
     aStudyBuilder->CommitCommand();
     if ( !aSO->_is_nil() ) {
       // Update Python script
@@ -1402,7 +1388,7 @@ SMESH::mesh_array* SMESH_Gen_i::CreateMeshesFromCGNS( const char* theFileName,
 
     if (theStatus == SMESH::DRS_OK)
     {
-      SALOMEDS::StudyBuilder_var aStudyBuilder = myCurrentStudy->NewBuilder();
+      SALOMEDS::StudyBuilder_var aStudyBuilder = getStudyServant()->NewBuilder();
       aStudyBuilder->NewCommand();  // There is a transaction
 
       int i = 0;
@@ -1430,7 +1416,7 @@ SMESH::mesh_array* SMESH_Gen_i::CreateMeshesFromCGNS( const char* theFileName,
         // publish mesh in the study
         SALOMEDS::SObject_wrap aSO;
         if ( CanPublishInStudy( mesh ) )
-          aSO = PublishMesh( myCurrentStudy, mesh.in(), meshName.c_str() );
+          aSO = PublishMesh( mesh.in(), meshName.c_str() );
 
         // Python Dump
         if ( !aSO->_is_nil() ) {
@@ -1480,10 +1466,9 @@ SMESH_Gen_i::CreateMeshesFromGMF( const char*             theFileName,
 #endif
   // publish mesh in the study
   if ( CanPublishInStudy( aMesh ) ) {
-    SALOMEDS::StudyBuilder_var aStudyBuilder = myCurrentStudy->NewBuilder();
+    SALOMEDS::StudyBuilder_var aStudyBuilder = getStudyServant()->NewBuilder();
     aStudyBuilder->NewCommand();  // There is a transaction
-    SALOMEDS::SObject_wrap aSO = PublishInStudy
-      ( myCurrentStudy, SALOMEDS::SObject::_nil(), aMesh.in(), aFileName.c_str() );
+    SALOMEDS::SObject_wrap aSO = PublishInStudy( SALOMEDS::SObject::_nil(), aMesh.in(), aFileName.c_str() );
     aStudyBuilder->CommitCommand();
     if ( !aSO->_is_nil() ) {
       // Update Python script
@@ -1550,16 +1535,17 @@ CORBA::Boolean SMESH_Gen_i::IsReadyToCompute( SMESH::SMESH_Mesh_ptr theMesh,
 SALOMEDS::SObject_ptr SMESH_Gen_i::GetAlgoSO(const ::SMESH_Algo* algo)
 {
   if ( algo ) {
-    if ( !myCurrentStudy->_is_nil() ) {
+  SALOMEDS::Study_var aStudy = getStudyServant();
+    if ( !aStudy->_is_nil() ) {
       // find algo in the study
       CORBA::String_var compDataType  = ComponentDataType();
-      SALOMEDS::SComponent_wrap father = myCurrentStudy->FindComponent( compDataType.in() );
+      SALOMEDS::SComponent_wrap father = aStudy->FindComponent( compDataType.in() );
       if ( !father->_is_nil() ) {
-        SALOMEDS::ChildIterator_wrap itBig = myCurrentStudy->NewChildIterator( father );
+        SALOMEDS::ChildIterator_wrap itBig = aStudy->NewChildIterator( father );
         for ( ; itBig->More(); itBig->Next() ) {
           SALOMEDS::SObject_wrap gotBranch = itBig->Value();
           if ( gotBranch->Tag() == GetAlgorithmsRootTag() ) {
-            SALOMEDS::ChildIterator_wrap algoIt = myCurrentStudy->NewChildIterator( gotBranch );
+            SALOMEDS::ChildIterator_wrap algoIt = aStudy->NewChildIterator( gotBranch );
             for ( ; algoIt->More(); algoIt->Next() ) {
               SALOMEDS::SObject_wrap algoSO = algoIt->Value();
               CORBA::Object_var     algoIOR = SObjectToObject( algoSO );
@@ -1639,7 +1625,7 @@ SMESH::compute_error_array* SMESH_Gen_i::GetComputeErrors( SMESH::SMESH_Mesh_ptr
           else {
             errStruct.algoName = error->myAlgo->GetName();
           }
-          errStruct.hasBadMesh = !error->myBadElements.empty();
+          errStruct.hasBadMesh = error->HasBadElems();
         }
       }
       error_array->length( nbErr );
@@ -1681,7 +1667,7 @@ SMESH_Gen_i::GetBadInputElements( SMESH::SMESH_Mesh_ptr theMesh,
       {
         // compute error
         SMESH_ComputeErrorPtr error = sm->GetComputeError();
-        if ( error && !error->myBadElements.empty())
+        if ( error && error->HasBadElems() )
         {
           typedef map<const SMDS_MeshElement*, int > TNode2LocalIDMap;
           typedef TNode2LocalIDMap::iterator         TNodeLocalID;
@@ -1691,8 +1677,10 @@ SMESH_Gen_i::GetBadInputElements( SMESH::SMESH_Mesh_ptr theMesh,
           list< TNodeLocalID > connectivity;
           int i, nbElements = 0, nbConnNodes = 0;
 
-          list<const SMDS_MeshElement*>::iterator elemIt  = error->myBadElements.begin();
-          list<const SMDS_MeshElement*>::iterator elemEnd = error->myBadElements.end();
+          const list<const SMDS_MeshElement*>& badElems =
+            static_cast<SMESH_BadInputElements*>( error.get() )->myBadElements;
+          list<const SMDS_MeshElement*>::const_iterator elemIt  = badElems.begin();
+          list<const SMDS_MeshElement*>::const_iterator elemEnd = badElems.end();
           for ( ; elemIt != elemEnd; ++elemIt, ++nbElements )
           {
             SMDS_ElemIteratorPtr nIt = (*elemIt)->nodesIterator();
@@ -1719,7 +1707,7 @@ SMESH_Gen_i::GetBadInputElements( SMESH::SMESH_Mesh_ptr theMesh,
           }
           // fill element types
           result->elementTypes.length( nbElements );
-          for ( i = 0, elemIt = error->myBadElements.begin(); i <nbElements; ++i, ++elemIt )
+          for ( i = 0, elemIt = badElems.begin(); i <nbElements; ++i, ++elemIt )
           {
             const SMDS_MeshElement* elem = *elemIt;
             result->elementTypes[i].SMDS_ElementType = (SMESH::ElementType) elem->GetType();
@@ -1942,7 +1930,7 @@ CORBA::Boolean SMESH_Gen_i::Compute( SMESH::SMESH_Mesh_ptr theMesh,
     ASSERT( meshServant );
     if ( meshServant ) {
       meshServant->Load();
-      // NPAL16168: "geometrical group edition from a submesh don't modifiy mesh computation"
+      // NPAL16168: "geometrical group edition from a submesh don't modify mesh computation"
       meshServant->CheckGeomModif();
       // get local TopoDS_Shape
       TopoDS_Shape myLocShape;
@@ -1959,6 +1947,7 @@ CORBA::Boolean SMESH_Gen_i::Compute( SMESH::SMESH_Mesh_ptr theMesh,
       bool ok = myGen.Compute( myLocMesh, myLocShape, how );
       meshServant->CreateGroupServants(); // algos can create groups (issue 0020918)
       myLocMesh.GetMeshDS()->Modified();
+      UpdateIcons( theMesh );
       return ok;
     }
   }
@@ -2027,7 +2016,7 @@ SMESH::MeshPreviewStruct* SMESH_Gen_i::Precompute( SMESH::SMESH_Mesh_ptr theMesh
     meshServant->Load();
     ASSERT( meshServant );
     if ( meshServant ) {
-      // NPAL16168: "geometrical group edition from a submesh don't modifiy mesh computation"
+      // NPAL16168: "geometrical group edition from a submesh don't modify mesh computation"
       meshServant->CheckGeomModif();
       // get local TopoDS_Shape
       TopoDS_Shape myLocShape;
@@ -2224,7 +2213,7 @@ SMESH::long_array* SMESH_Gen_i::Evaluate(SMESH::SMESH_Mesh_ptr theMesh,
     ASSERT( meshServant );
     if ( meshServant ) {
       meshServant->Load();
-      // NPAL16168: "geometrical group edition from a submesh don't modifiy mesh computation"
+      // NPAL16168: "geometrical group edition from a submesh don't modify mesh computation"
       meshServant->CheckGeomModif();
       // get local TopoDS_Shape
       TopoDS_Shape myLocShape;
@@ -2295,16 +2284,16 @@ SMESH_Gen_i::GetGeometryByMeshElement( SMESH::SMESH_Mesh_ptr  theMesh,
     GEOM::GEOM_Gen_ptr    geomGen   = GetGeomEngine();
 
     // try to find the corresponding SObject
-    SALOMEDS::SObject_wrap SObj = ObjectToSObject( myCurrentStudy, geom.in() );
+    SALOMEDS::SObject_wrap SObj = ObjectToSObject( geom.in() );
     if ( SObj->_is_nil() ) // submesh can be not found even if published
     {
       // try to find published submesh
       GEOM::ListOfLong_var list = geom->GetSubShapeIndices();
       if ( !geom->IsMainShape() && list->length() == 1 ) {
-        SALOMEDS::SObject_wrap mainSO = ObjectToSObject( myCurrentStudy, mainShape );
+        SALOMEDS::SObject_wrap mainSO = ObjectToSObject( mainShape );
         SALOMEDS::ChildIterator_wrap it;
         if ( !mainSO->_is_nil() ) {
-          it = myCurrentStudy->NewChildIterator( mainSO );
+          it = getStudyServant()->NewChildIterator( mainSO );
         }
         if ( !it->_is_nil() ) {
           for ( it->InitEx(true); it->More(); it->Next() ) {
@@ -2324,7 +2313,7 @@ SMESH_Gen_i::GetGeometryByMeshElement( SMESH::SMESH_Mesh_ptr  theMesh,
       }
     }
     if ( SObj->_is_nil() ) // publish a new subshape
-      SObj = geomGen->AddInStudy( myCurrentStudy, geom, theGeomName, mainShape );
+      SObj = geomGen->AddInStudy( geom, theGeomName, mainShape );
 
     // return only published geometry
     if ( !SObj->_is_nil() ) {
@@ -2372,10 +2361,10 @@ SMESH_Gen_i::FindGeometryByMeshElement( SMESH::SMESH_Mesh_ptr  theMesh,
         GEOM::GEOM_Object_var geom = ShapeToGeomObject( meshDS->IndexToShape( shapeID ));
         if ( geom->_is_nil() ) {
           // try to find a published sub-shape
-          SALOMEDS::SObject_wrap mainSO = ObjectToSObject( myCurrentStudy, mainShape );
+          SALOMEDS::SObject_wrap mainSO = ObjectToSObject( mainShape );
           SALOMEDS::ChildIterator_wrap it;
           if ( !mainSO->_is_nil() ) {
-            it = myCurrentStudy->NewChildIterator( mainSO );
+            it = getStudyServant()->NewChildIterator( mainSO );
           }
           if ( !it->_is_nil() ) {
             for ( it->InitEx(true); it->More(); it->Next() ) {
@@ -2394,8 +2383,7 @@ SMESH_Gen_i::FindGeometryByMeshElement( SMESH::SMESH_Mesh_ptr  theMesh,
         }
         if ( geom->_is_nil() ) {
           // explode
-          GEOM::GEOM_IShapesOperations_wrap op =
-            geomGen->GetIShapesOperations( GetCurrentStudyID() );
+          GEOM::GEOM_IShapesOperations_wrap op = geomGen->GetIShapesOperations();
           if ( !op->_is_nil() )
             geom = op->GetSubShape( mainShape, shapeID );
         }
@@ -2571,7 +2559,7 @@ SMESH_Gen_i::ConcatenateCommon(const SMESH::ListOfIDSources& theMeshesArray,
 
         // make a group name
         std::string groupName = "Gr";
-        SALOMEDS::SObject_wrap meshSO = ObjectToSObject( myCurrentStudy, theMeshesArray[i] );
+        SALOMEDS::SObject_wrap meshSO = ObjectToSObject( theMeshesArray[i] );
         if ( meshSO ) {
           CORBA::String_var name = meshSO->GetName();
           groupName += name;
@@ -2701,7 +2689,7 @@ SMESH_Gen_i::ConcatenateCommon(const SMESH::ListOfIDSources& theMeshesArray,
   }
 
   // IPAL21468 Change icon of compound because it need not be computed.
-  SALOMEDS::SObject_wrap meshSO = ObjectToSObject( myCurrentStudy, newMesh );
+  SALOMEDS::SObject_wrap meshSO = ObjectToSObject( newMesh );
   SetPixMap( meshSO, "ICON_SMESH_TREE_MESH" );
 
   newMeshDS->Modified();
@@ -2747,7 +2735,7 @@ SMESH::SMESH_Mesh_ptr SMESH_Gen_i::CopyMesh(SMESH::SMESH_IDSource_ptr meshPart,
   SMESH_Mesh_i*       newMesh_i = SMESH::DownCast<SMESH_Mesh_i*>( newMesh );
   if ( !newMesh_i )
     THROW_SALOME_CORBA_EXCEPTION( "can't create a mesh", SALOME::INTERNAL_ERROR );
-  SALOMEDS::SObject_wrap meshSO = ObjectToSObject(myCurrentStudy, newMesh );
+  SALOMEDS::SObject_wrap meshSO = ObjectToSObject( newMesh );
   if ( !meshSO->_is_nil() )
   {
     SetName( meshSO, meshName, "Mesh" );
@@ -2938,6 +2926,22 @@ SMESH::SMESH_Mesh_ptr SMESH_Gen_i::CopyMesh(SMESH::SMESH_IDSource_ptr meshPart,
   return newMesh._retn();
 }
 
+//================================================================================
+/*!
+ * \brief Get version of MED format being used.
+ */
+//================================================================================
+
+char* SMESH_Gen_i::GetMEDFileVersion()
+{
+  MED::TInt majeur, mineur, release;
+  majeur =  mineur = release = 0;
+  MED::GetVersionRelease(majeur, mineur, release);
+  std::ostringstream version;
+  version << majeur << "." << mineur << "." << release;
+  return CORBA::string_dup( version.str().c_str() );
+}
+
 //================================================================================
 /*!
  *  SMESH_Gen_i::GetMEDVersion
@@ -2945,28 +2949,34 @@ SMESH::SMESH_Mesh_ptr SMESH_Gen_i::CopyMesh(SMESH::SMESH_IDSource_ptr meshPart,
  *  Get MED version of the file by its name
  */
 //================================================================================
-CORBA::Boolean SMESH_Gen_i::GetMEDVersion(const char* theFileName,
-                                          SMESH::MED_VERSION& theVersion)
+char* SMESH_Gen_i::GetMEDVersion(const char* theFileName)
 {
-  theVersion = SMESH::MED_V2_1;
-  MED::EVersion aVersion = MED::GetVersionId( theFileName );
-  switch( aVersion ) {
-    case MED::eV2_1     : theVersion = SMESH::MED_V2_1;    return true;
-    case MED::eV2_2     : theVersion = SMESH::MED_V2_2;    return true;
-    case MED::eLATEST   : theVersion = SMESH::MED_LATEST;  return true;
-    case MED::eMINOR_0  : theVersion = SMESH::MED_MINOR_0; return true;
-    case MED::eMINOR_1  : theVersion = SMESH::MED_MINOR_1; return true;
-    case MED::eMINOR_2  : theVersion = SMESH::MED_MINOR_2; return true;
-    case MED::eMINOR_3  : theVersion = SMESH::MED_MINOR_3; return true;
-    case MED::eMINOR_4  : theVersion = SMESH::MED_MINOR_4; return true;
-    case MED::eMINOR_5  : theVersion = SMESH::MED_MINOR_5; return true;
-    case MED::eMINOR_6  : theVersion = SMESH::MED_MINOR_6; return true;
-    case MED::eMINOR_7  : theVersion = SMESH::MED_MINOR_7; return true;
-    case MED::eMINOR_8  : theVersion = SMESH::MED_MINOR_8; return true;
-    case MED::eMINOR_9  : theVersion = SMESH::MED_MINOR_9; return true;
-    case MED::eVUnknown : return false;
-  }
-  return false;
+  std::string version = MED::GetMEDVersion( theFileName );
+  return CORBA::string_dup( version.c_str() );
+}
+
+//================================================================================
+/*!
+ *  SMESH_Gen_i::CheckCompatibility
+ *
+ *  Check compatibility of file with MED format being used, read only.
+ */
+//================================================================================
+CORBA::Boolean SMESH_Gen_i::CheckCompatibility(const char* theFileName)
+{
+  return MED::CheckCompatibility( theFileName );
+}
+
+//================================================================================
+/*!
+ *  SMESH_Gen_i::CheckWriteCompatibility
+ *
+ *  Check compatibility of file with MED format being used, for append on write.
+ */
+//================================================================================
+CORBA::Boolean SMESH_Gen_i::CheckWriteCompatibility(const char* theFileName)
+{
+  return MED::CheckCompatibility( theFileName, true );
 }
 
 //================================================================================
@@ -2978,10 +2988,12 @@ CORBA::Boolean SMESH_Gen_i::GetMEDVersion(const char* theFileName,
 //================================================================================
 SMESH::string_array* SMESH_Gen_i::GetMeshNames(const char* theFileName)
 {
+  //MESSAGE("GetMeshNames " << theFileName);
   SMESH::string_array_var aResult = new SMESH::string_array();
-  MED::PWrapper aMed = MED::CrWrapper( theFileName );
+  MED::PWrapper aMed = MED::CrWrapperR( theFileName );
   MED::TErr anErr;
   MED::TInt aNbMeshes = aMed->GetNbMeshes( &anErr );
+  //MESSAGE("---" << aNbMeshes);
   if( anErr >= 0 ) {
     aResult->length( aNbMeshes );
     for( MED::TInt i = 0; i < aNbMeshes; i++ ) {
@@ -3003,16 +3015,13 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
                                       const char*              theURL,
                                       bool                     isMultiFile )
 {
-  //  ASSERT( theComponent->GetStudy()->StudyId() == myCurrentStudy->StudyId() )
-  // san -- in case <myCurrentStudy> differs from theComponent's study,
-  // use that of the component
-  if ( theComponent->GetStudy()->StudyId() != GetCurrentStudyID() )
-    SetCurrentStudy( theComponent->GetStudy() );
+  if (!myStudyContext)
+    UpdateStudy();
 
   // Store study contents as a set of python commands
-  SavePython(myCurrentStudy);
+  SavePython();
 
-  StudyContext* myStudyContext = GetCurrentStudyContext();
+  SALOMEDS::Study_var aStudy = getStudyServant();
 
   // Declare a byte stream
   SALOMEDS::TMPFile_var aStreamFile;
@@ -3022,20 +3031,20 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
     ( isMultiFile ) ? TCollection_AsciiString( ( char* )theURL ) : ( char* )SALOMEDS_Tool::GetTmpDir().c_str();
 
   // Create a sequence of files processed
-  SALOMEDS::ListOfFileNames_var aFileSeq = new SALOMEDS::ListOfFileNames;
-  aFileSeq->length( NUM_TMP_FILES );
+  SALOMEDS_Tool::ListOfFiles aFileSeq;
+  aFileSeq.reserve( NUM_TMP_FILES );
 
   TCollection_AsciiString aStudyName( "" );
   if ( isMultiFile )
-    aStudyName = ( (char*)SALOMEDS_Tool::GetNameFromPath( myCurrentStudy->URL() ).c_str() );
+    aStudyName = ( (char*)SALOMEDS_Tool::GetNameFromPath( Kernel_Utils::encode(aStudy->URL()) ).c_str() );
 
   // Set names of temporary files
   TCollection_AsciiString filename =
     aStudyName + TCollection_AsciiString( "_SMESH.hdf" );        // for SMESH data itself
   TCollection_AsciiString meshfile =
     aStudyName + TCollection_AsciiString( "_SMESH_Mesh.med" );   // for mesh data to be stored in MED file
-  aFileSeq[ 0 ] = CORBA::string_dup( filename.ToCString() );
-  aFileSeq[ 1 ] = CORBA::string_dup( meshfile.ToCString() );
+  aFileSeq.push_back(CORBA::string_dup( filename.ToCString() ));
+  aFileSeq.push_back(CORBA::string_dup( meshfile.ToCString() ));
   filename = tmpDir + filename;
   meshfile = tmpDir + meshfile;
 
@@ -3069,7 +3078,7 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
   // SetStoreName() to groups before storing hypotheses to let them refer to
   // groups using "store name", which is "Group <group_persistent_id>"
   {
-    SALOMEDS::ChildIterator_wrap itBig = myCurrentStudy->NewChildIterator( theComponent );
+    SALOMEDS::ChildIterator_wrap itBig = aStudy->NewChildIterator( theComponent );
     for ( ; itBig->More(); itBig->Next() ) {
       SALOMEDS::SObject_wrap gotBranch = itBig->Value();
       if ( gotBranch->Tag() > GetAlgorithmsRootTag() ) {
@@ -3080,7 +3089,6 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
             myMesh->Load(); // load from study file if not yet done
             TPythonDump pd; // not to dump GetGroups()
             SMESH::ListOfGroups_var groups = myMesh->GetGroups();
-            pd << ""; // to avoid optimizing pd out
             for ( CORBA::ULong i = 0; i < groups->length(); ++i )
             {
               SMESH_GroupBase_i* grImpl = SMESH::DownCast<SMESH_GroupBase_i*>( groups[i]);
@@ -3106,7 +3114,7 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
   aFile->CreateOnDisk();
 
   // --> iterator for top-level objects
-  SALOMEDS::ChildIterator_wrap itBig = myCurrentStudy->NewChildIterator( theComponent );
+  SALOMEDS::ChildIterator_wrap itBig = aStudy->NewChildIterator( theComponent );
   for ( ; itBig->More(); itBig->Next() ) {
     SALOMEDS::SObject_wrap gotBranch = itBig->Value();
 
@@ -3117,7 +3125,7 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
       aTopGroup->CreateOnDisk();
 
       // iterator for all hypotheses
-      SALOMEDS::ChildIterator_wrap it = myCurrentStudy->NewChildIterator( gotBranch );
+      SALOMEDS::ChildIterator_wrap it = aStudy->NewChildIterator( gotBranch );
       for ( ; it->More(); it->Next() ) {
         SALOMEDS::SObject_wrap mySObject = it->Value();
         CORBA::Object_var anObject = SObjectToObject( mySObject );
@@ -3126,8 +3134,9 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
           if ( !myHyp->_is_nil() ) {
             SMESH_Hypothesis_i* myImpl = dynamic_cast<SMESH_Hypothesis_i*>( GetServant( myHyp ).in() );
             if ( myImpl ) {
-              string hypname = string( myHyp->GetName() );
-              string libname = string( myHyp->GetLibName() );
+              CORBA::String_var hn = myHyp->GetName(), ln = myHyp->GetLibName();
+              std::string hypname = hn.in();
+              std::string libname = ln.in();
               // BUG SWP13062
               // Needs for save crossplatform libname, i.e. parth of name ( ".dll" for
               // WIN32 and ".so" for X-system) must be deleted
@@ -3139,13 +3148,13 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
               // PAL17753 (Regression: missing hypothesis in restored study)
               // "lib" also should be removed from the beginning
               //if( libname_len > 3 )
-                //libname.resize( libname_len - 3 );
+              //libname.resize( libname_len - 3 );
               if( libname_len > 6 )
                 libname = libname.substr( 3, libname_len - 3 - 3 );
 #endif
-              CORBA::String_var objStr = GetORB()->object_to_string( anObject );
-              int    id      = myStudyContext->findId( string( objStr.in() ) );
-              string hypdata = string( myImpl->SaveTo() );
+              CORBA::String_var  objStr = GetORB()->object_to_string( anObject );
+              CORBA::String_var hypdata = myImpl->SaveTo();
+              int                    id = myStudyContext->findId( string( objStr.in() ));
 
               // for each hypothesis create HDF group basing on its id
               char hypGrpName[30];
@@ -3165,10 +3174,10 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
               aDataset->WriteOnDisk( ( char* )( libname.c_str() ) );
               aDataset->CloseOnDisk();
               // --> persistent data of hypothesis
-              aSize[ 0 ] = hypdata.length() + 1;
+              aSize[ 0 ] = strlen( hypdata.in() ) + 1;
               aDataset = new HDFdataset( "Data", aGroup, HDF_STRING, aSize, 1 );
               aDataset->CreateOnDisk();
-              aDataset->WriteOnDisk( ( char* )( hypdata.c_str() ) );
+              aDataset->WriteOnDisk( ( char* )( hypdata.in() ) );
               aDataset->CloseOnDisk();
               // close hypothesis HDF group
               aGroup->CloseOnDisk();
@@ -3186,7 +3195,7 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
       aTopGroup->CreateOnDisk();
 
       // iterator for all algorithms
-      SALOMEDS::ChildIterator_wrap it = myCurrentStudy->NewChildIterator( gotBranch );
+      SALOMEDS::ChildIterator_wrap it = aStudy->NewChildIterator( gotBranch );
       for ( ; it->More(); it->Next() ) {
         SALOMEDS::SObject_wrap mySObject = it->Value();
         CORBA::Object_var anObject = SObjectToObject( mySObject );
@@ -3195,8 +3204,9 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
           if ( !myHyp->_is_nil() ) {
             SMESH_Hypothesis_i* myImpl = dynamic_cast<SMESH_Hypothesis_i*>( GetServant( myHyp ).in() );
             if ( myImpl ) {
-              string hypname = string( myHyp->GetName() );
-              string libname = string( myHyp->GetLibName() );
+              CORBA::String_var hn = myHyp->GetName(), ln = myHyp->GetLibName();
+              std::string hypname = hn.in();
+              std::string libname = ln.in();
               // BUG SWP13062
               // Needs for save crossplatform libname, i.e. parth of name ( ".dll" for
               // WIN32 and ".so" for X-system) must be deleted
@@ -3208,13 +3218,13 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
               // PAL17753 (Regression: missing hypothesis in restored study)
               // "lib" also should be removed from the beginning
               //if( libname_len > 3 )
-                //libname.resize( libname_len - 3 );
+              //libname.resize( libname_len - 3 );
               if( libname_len > 6 )
                 libname = libname.substr( 3, libname_len - 3 - 3 );
 #endif
-              CORBA::String_var objStr = GetORB()->object_to_string( anObject );
-              int    id      = myStudyContext->findId( string( objStr.in() ) );
-              string hypdata = string( myImpl->SaveTo() );
+              CORBA::String_var  objStr = GetORB()->object_to_string( anObject );
+              CORBA::String_var hypdata = myImpl->SaveTo();
+              int                    id = myStudyContext->findId( string( objStr.in() ) );
 
               // for each algorithm create HDF group basing on its id
               char hypGrpName[30];
@@ -3234,10 +3244,10 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
               aDataset->WriteOnDisk( ( char* )( libname.c_str() ) );
               aDataset->CloseOnDisk();
               // --> persistent data of algorithm
-              aSize[0] = hypdata.length() + 1;
+              aSize[0] = strlen( hypdata.in() ) + 1;
               aDataset = new HDFdataset( "Data", aGroup, HDF_STRING, aSize, 1 );
               aDataset->CreateOnDisk();
-              aDataset->WriteOnDisk( ( char* )( hypdata.c_str() ) );
+              aDataset->WriteOnDisk( ( char* )( hypdata.in() ));
               aDataset->CloseOnDisk();
               // close algorithm HDF group
               aGroup->CloseOnDisk();
@@ -3319,29 +3329,41 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
               SALOMEDS::SObject_wrap myShape;
               bool ok = myRef->ReferencedObject( myShape.inout() );
               if ( ok ) {
-                shapeRefFound = (! CORBA::is_nil( myShape->GetObject() ));
-                string myRefOnObject = myShape->GetID();
-                if ( shapeRefFound && myRefOnObject.length() > 0 ) {
-                  aSize[ 0 ] = myRefOnObject.length() + 1;
+                CORBA::Object_var shapeObj = myShape->GetObject();
+                shapeRefFound = (! CORBA::is_nil( shapeObj ));
+                CORBA::String_var myRefOnObject = myShape->GetID();
+                if ( shapeRefFound && myRefOnObject.in()[0] ) {
+                  aSize[ 0 ] = strlen( myRefOnObject.in() ) + 1;
                   aDataset = new HDFdataset( "Ref on shape", aTopGroup, HDF_STRING, aSize, 1 );
                   aDataset->CreateOnDisk();
-                  aDataset->WriteOnDisk( ( char* )( myRefOnObject.c_str() ) );
+                  aDataset->WriteOnDisk( ( char* )( myRefOnObject.in() ) );
                   aDataset->CloseOnDisk();
                 }
               }
             }
 
+            // Store file info
+            std::string info = myImpl->FileInfoToString();
+            if ( !info.empty() )
+            {
+              aSize[ 0 ] = info.size();
+              aDataset = new HDFdataset( "file info", aTopGroup, HDF_STRING, aSize, 1 );
+              aDataset->CreateOnDisk();
+              aDataset->WriteOnDisk( (char*) info.data() );
+              aDataset->CloseOnDisk();
+            }
+
             // write applied hypotheses if exist
             SALOMEDS::SObject_wrap myHypBranch;
             found = gotBranch->FindSubObject( GetRefOnAppliedHypothesisTag(), myHypBranch.inout() );
-            if ( found && !shapeRefFound && hasShape) { // remove applied hyps
-              myCurrentStudy->NewBuilder()->RemoveObjectWithChildren( myHypBranch );
+            if ( found && !shapeRefFound && hasShape ) { // remove applied hyps
+              aStudy->NewBuilder()->RemoveObjectWithChildren( myHypBranch );
             }
             if ( found && (shapeRefFound || !hasShape) ) {
               aGroup = new HDFgroup( "Applied Hypotheses", aTopGroup );
               aGroup->CreateOnDisk();
 
-              SALOMEDS::ChildIterator_wrap it = myCurrentStudy->NewChildIterator( myHypBranch );
+              SALOMEDS::ChildIterator_wrap it = aStudy->NewChildIterator( myHypBranch );
               int hypNb = 0;
               for ( ; it->More(); it->Next() ) {
                 SALOMEDS::SObject_wrap mySObject = it->Value();
@@ -3379,13 +3401,13 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
             found = gotBranch->FindSubObject( GetRefOnAppliedAlgorithmsTag(),
                                               myAlgoBranch.inout() );
             if ( found && !shapeRefFound && hasShape) { // remove applied algos
-              myCurrentStudy->NewBuilder()->RemoveObjectWithChildren( myAlgoBranch );
+              aStudy->NewBuilder()->RemoveObjectWithChildren( myAlgoBranch );
             }
             if ( found && (shapeRefFound || !hasShape)) {
               aGroup = new HDFgroup( "Applied Algorithms", aTopGroup );
               aGroup->CreateOnDisk();
 
-              SALOMEDS::ChildIterator_wrap it = myCurrentStudy->NewChildIterator( myAlgoBranch );
+              SALOMEDS::ChildIterator_wrap it = aStudy->NewChildIterator( myAlgoBranch );
               int algoNb = 0;
               for ( ; it->More(); it->Next() ) {
                 SALOMEDS::SObject_wrap mySObject = it->Value();
@@ -3428,7 +3450,7 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
               {
                 bool hasShapeRef = false;
                 SALOMEDS::ChildIterator_wrap itSM =
-                  myCurrentStudy->NewChildIterator( mySubmeshBranch );
+                  aStudy->NewChildIterator( mySubmeshBranch );
                 for ( ; itSM->More(); itSM->Next() ) {
                   SALOMEDS::SObject_wrap mySubRef, myShape, mySObject = itSM->Value();
                   if ( mySObject->FindSubObject( GetRefOnShapeTag(), mySubRef.inout() ))
@@ -3453,11 +3475,11 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
                         }
                       }
                     }
-                    myCurrentStudy->NewBuilder()->RemoveObjectWithChildren( mySObject );
+                    aStudy->NewBuilder()->RemoveObjectWithChildren( mySObject );
                   }
                 } // loop on submeshes of a type
                 if ( !shapeRefFound || !hasShapeRef ) { // remove the whole submeshes branch
-                  myCurrentStudy->NewBuilder()->RemoveObjectWithChildren( mySubmeshBranch );
+                  aStudy->NewBuilder()->RemoveObjectWithChildren( mySubmeshBranch );
                   found = false;
                 }
               }  // end check if there is shape reference in submeshes
@@ -3483,7 +3505,7 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
                 aGroup->CreateOnDisk();
 
                 // iterator for all submeshes of given type
-                SALOMEDS::ChildIterator_wrap itSM = myCurrentStudy->NewChildIterator( mySubmeshBranch );
+                SALOMEDS::ChildIterator_wrap itSM = aStudy->NewChildIterator( mySubmeshBranch );
                 for ( ; itSM->More(); itSM->Next() ) {
                   SALOMEDS::SObject_wrap mySObject = itSM->Value();
                   CORBA::Object_var anSubObject = SObjectToObject( mySObject );
@@ -3520,7 +3542,7 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
                       aSubSubGroup = new HDFgroup( "Applied Hypotheses", aSubGroup );
                       aSubSubGroup->CreateOnDisk();
 
-                      SALOMEDS::ChildIterator_wrap it = myCurrentStudy->NewChildIterator( mySubHypBranch );
+                      SALOMEDS::ChildIterator_wrap it = aStudy->NewChildIterator( mySubHypBranch );
                       int hypNb = 0;
                       for ( ; it->More(); it->Next() ) {
                         SALOMEDS::SObject_wrap mySubSObject = it->Value();
@@ -3557,7 +3579,7 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
                       aSubSubGroup->CreateOnDisk();
 
                       SALOMEDS::ChildIterator_wrap it =
-                        myCurrentStudy->NewChildIterator( mySubAlgoBranch );
+                        aStudy->NewChildIterator( mySubAlgoBranch );
                       int algoNb = 0;
                       for ( ; it->More(); it->Next() ) {
                         SALOMEDS::SObject_wrap mySubSObject = it->Value();
@@ -3653,7 +3675,7 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
                 aGroup = new HDFgroup( name_group, aTopGroup );
                 aGroup->CreateOnDisk();
 
-                SALOMEDS::ChildIterator_wrap it = myCurrentStudy->NewChildIterator( myGroupsBranch );
+                SALOMEDS::ChildIterator_wrap it = aStudy->NewChildIterator( myGroupsBranch );
                 for ( ; it->More(); it->Next() ) {
                   SALOMEDS::SObject_wrap mySObject = it->Value();
                   CORBA::Object_var aSubObject = SObjectToObject( mySObject );
@@ -3671,8 +3693,8 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
 
                     // For each group, create a dataset named "Group <group_persistent_id>"
                     // and store the group's user name into it
-                    const char* grpName = aGrpBaseDS->GetStoreName();
-                    char* aUserName = myGroupImpl->GetName();
+                    const char*         grpName = aGrpBaseDS->GetStoreName();
+                    CORBA::String_var aUserName = myGroupImpl->GetName();
                     aSize[ 0 ] = strlen( aUserName ) + 1;
 
                     aDataset = new HDFdataset( grpName, aGroup, HDF_STRING, aSize, 1 );
@@ -3710,14 +3732,14 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
                           mySubRef->ReferencedObject( myShape.inout() ) &&
                           !CORBA::is_nil( myShape->GetObject() ))
                       {
-                        string myRefOnObject = myShape->GetID();
-                        if ( myRefOnObject.length() > 0 ) {
+                        CORBA::String_var myRefOnObject = myShape->GetID();
+                        if ( myRefOnObject.in()[0] ) {
                           char aRefName[ 30 ];
                           sprintf( aRefName, "Ref on shape %d", anId);
-                          aSize[ 0 ] = myRefOnObject.length() + 1;
+                          aSize[ 0 ] = strlen( myRefOnObject.in() ) + 1;
                           aDataset = new HDFdataset(aRefName, aGroup, HDF_STRING, aSize, 1);
                           aDataset->CreateOnDisk();
-                          aDataset->WriteOnDisk( ( char* )( myRefOnObject.c_str() ) );
+                          aDataset->WriteOnDisk( ( char* )( myRefOnObject.in() ));
                           aDataset->CloseOnDisk();
                         }
                       }
@@ -3865,8 +3887,7 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
                       // Position
                       const SMDS_PositionPtr pos = node->GetPosition();
                       if ( onFace ) { // on FACE
-                        const SMDS_FacePosition* fPos =
-                          dynamic_cast<const SMDS_FacePosition*>( pos );
+                        SMDS_FacePositionPtr fPos = pos;
                         if ( fPos ) {
                           aUPos[ iNode ] = fPos->GetUParameter();
                           aVPos[ iNode ] = fPos->GetVParameter();
@@ -3876,8 +3897,7 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
                           nbNodes--;
                       }
                       else { // on EDGE
-                        const SMDS_EdgePosition* ePos =
-                          dynamic_cast<const SMDS_EdgePosition*>( pos );
+                        SMDS_EdgePositionPtr ePos = pos;
                         if ( ePos ) {
                           aUPos[ iNode ] = ePos->GetUParameter();
                           iNode++;
@@ -3938,11 +3958,11 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save( SALOMEDS::SComponent_ptr theComponent,
   delete aFile;
 
   // Convert temporary files to stream
-  aStreamFile = SALOMEDS_Tool::PutFilesToStream( tmpDir.ToCString(), aFileSeq.in(), isMultiFile );
+  aStreamFile = SALOMEDS_Tool::PutFilesToStream( tmpDir.ToCString(), aFileSeq, isMultiFile );
 
   // Remove temporary files and directory
   if ( !isMultiFile )
-    SALOMEDS_Tool::RemoveTemporaryFiles( tmpDir.ToCString(), aFileSeq.in(), true );
+    SALOMEDS_Tool::RemoveTemporaryFiles( tmpDir.ToCString(), aFileSeq, true );
 
   return aStreamFile._retn();
 }
@@ -3989,11 +4009,7 @@ void SMESH_Gen_i::loadGeomData( SALOMEDS::SComponent_ptr theCompRoot )
   if ( theCompRoot->_is_nil() )
     return;
 
-  SALOMEDS::Study_var aStudy = SALOMEDS::Study::_narrow( theCompRoot->GetStudy() );
-  if ( aStudy->_is_nil() )
-    return;
-
-  SALOMEDS::StudyBuilder_var aStudyBuilder = aStudy->NewBuilder();
+  SALOMEDS::StudyBuilder_var aStudyBuilder = getStudyServant()->NewBuilder();
   aStudyBuilder->LoadWith( theCompRoot, GetGeomEngine() );
 }
 
@@ -4010,30 +4026,27 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
                         const char*              theURL,
                         bool                     isMultiFile )
 {
-  if ( theComponent->GetStudy()->StudyId() != GetCurrentStudyID() )
-    SetCurrentStudy( theComponent->GetStudy() );
-
+  //if (!myStudyContext)
+    UpdateStudy();
+  SALOMEDS::Study_var aStudy = getStudyServant();
   /*  if( !theComponent->_is_nil() )
       {
-      //SALOMEDS::Study_var aStudy = SALOMEDS::Study::_narrow( theComponent->GetStudy() );
-      if( !myCurrentStudy->FindComponent( "GEOM" )->_is_nil() )
-      loadGeomData( myCurrentStudy->FindComponent( "GEOM" ) );
+      if( !aStudy->FindComponent( "GEOM" )->_is_nil() )
+      loadGeomData( aStudy->FindComponent( "GEOM" ) );
       }*/
 
-  StudyContext* myStudyContext = GetCurrentStudyContext();
-
   // Get temporary files location
   TCollection_AsciiString tmpDir =
     ( char* )( isMultiFile ? theURL : SALOMEDS_Tool::GetTmpDir().c_str() );
 
   // Convert the stream into sequence of files to process
-  SALOMEDS::ListOfFileNames_var aFileSeq = SALOMEDS_Tool::PutStreamToFiles( theStream,
-                                                                            tmpDir.ToCString(),
-                                                                            isMultiFile );
+  SALOMEDS_Tool::ListOfFiles aFileSeq = SALOMEDS_Tool::PutStreamToFiles( theStream,
+                                                                         tmpDir.ToCString(),
+                                                                         isMultiFile );
   TCollection_AsciiString aStudyName( "" );
   if ( isMultiFile ) {
-    CORBA::String_var url = myCurrentStudy->URL();
-    aStudyName = (char*)SALOMEDS_Tool::GetNameFromPath( url.in() ).c_str();
+    CORBA::WString_var url = aStudy->URL();
+    aStudyName = (char*)SALOMEDS_Tool::GetNameFromPath( Kernel_Utils::encode(url.in()) ).c_str();
   }
   // Set names of temporary files
   TCollection_AsciiString filename = tmpDir + aStudyName + "_SMESH.hdf";
@@ -4337,7 +4350,7 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
             aDataset->ReadFromDisk( refFromFile );
             aDataset->CloseOnDisk();
             if ( strlen( refFromFile ) > 0 ) {
-              SALOMEDS::SObject_wrap shapeSO = myCurrentStudy->FindObjectID( refFromFile );
+              SALOMEDS::SObject_wrap shapeSO = aStudy->FindObjectID( refFromFile );
 
               // Make sure GEOM data are loaded first
               //loadGeomData( shapeSO->GetFatherComponent() );
@@ -4364,6 +4377,18 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
             myNewMeshImpl->GetImpl().GetMeshDS()->SetPersistentId( *meshPersistentId );
             delete [] meshPersistentId;
           }
+
+          // Restore file info
+          if ( aTopGroup->ExistInternalObject( "file info" ))
+          {
+            aDataset = new HDFdataset( "file info", aTopGroup );
+            aDataset->OpenOnDisk();
+            size = aDataset->GetSize();
+            std::string info( size, ' ');
+            aDataset->ReadFromDisk( (char*) info.data() );
+            aDataset->CloseOnDisk();
+            myNewMeshImpl->FileInfoFromString( info );
+          }
         }
       }
     } // reading MESHes
@@ -4436,7 +4461,7 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
             aDataset->ReadFromDisk( refFromFile );
             aDataset->CloseOnDisk();
             // san - it is impossible to recover applied algorithms using their entries within Load() method
-            //SALOMEDS::SObject_wrap hypSO = myCurrentStudy->FindObjectID( refFromFile );
+            //SALOMEDS::SObject_wrap hypSO = aStudy->FindObjectID( refFromFile );
             //CORBA::Object_var hypObject = SObjectToObject( hypSO );
             int id = atoi( refFromFile );
             delete [] refFromFile;
@@ -4473,7 +4498,7 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
             aDataset->ReadFromDisk( refFromFile );
             aDataset->CloseOnDisk();
             // san - it is impossible to recover applied hypotheses using their entries within Load() method
-            //SALOMEDS::SObject_wrap hypSO = myCurrentStudy->FindObjectID( refFromFile );
+            //SALOMEDS::SObject_wrap hypSO = myStudy->FindObjectID( refFromFile );
             //CORBA::Object_var hypObject = SObjectToObject( hypSO );
             int id = atoi( refFromFile );
             delete [] refFromFile;
@@ -4544,7 +4569,7 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
                 aDataset->ReadFromDisk( refFromFile );
                 aDataset->CloseOnDisk();
                 if ( strlen( refFromFile ) > 0 ) {
-                  SALOMEDS::SObject_wrap subShapeSO = myCurrentStudy->FindObjectID( refFromFile );
+                  SALOMEDS::SObject_wrap subShapeSO = aStudy->FindObjectID( refFromFile );
                   CORBA::Object_var subShapeObject = SObjectToObject( subShapeSO );
                   if ( !CORBA::is_nil( subShapeObject ) ) {
                     aSubShapeObject = GEOM::GEOM_Object::_narrow( subShapeObject );
@@ -4558,6 +4583,7 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
                     myStudyContext->mapOldToNew( subid, newSubId );
                   }
                 }
+                delete [] refFromFile;
               }
 
               if ( aSubMesh->_is_nil() )
@@ -4592,6 +4618,7 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
                           myNewMeshImpl->addHypothesis( aSubShapeObject, anHyp );
                       }
                     }
+                    delete [] refFromFile;
                   }
                 }
                 // close "applied algorithms" HDF group
@@ -4627,6 +4654,7 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
                           myNewMeshImpl->addHypothesis( aSubShapeObject, anHyp );
                       }
                     }
+                    delete [] refFromFile;
                   }
                 }
                 // close "APPLIED HYPOTHESES" hdf group
@@ -4700,7 +4728,7 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
                 aDataset->ReadFromDisk( refFromFile );
                 aDataset->CloseOnDisk();
                 if ( strlen( refFromFile ) > 0 ) {
-                  SALOMEDS::SObject_wrap shapeSO = myCurrentStudy->FindObjectID( refFromFile );
+                  SALOMEDS::SObject_wrap shapeSO = aStudy->FindObjectID( refFromFile );
                   CORBA::Object_var shapeObject = SObjectToObject( shapeSO );
                   if ( !CORBA::is_nil( shapeObject ) ) {
                     aShapeObject = GEOM::GEOM_Object::_narrow( shapeObject );
@@ -4708,6 +4736,7 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
                       aShape = GeomObjectToShape( aShapeObject );
                   }
                 }
+                delete [] refFromFile;
               }
               // Try to read a filter of SMESH_GroupOnFilter
               SMESH::Filter_var filter;
@@ -4726,12 +4755,14 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
                   predicate = SMESH_GroupOnFilter_i::GetPredicate( filter );
                   filters.push_back( filter );
                 }
+                delete [] persistStr;
               }
 
               // Create group servant
               SMESH::ElementType type = (SMESH::ElementType)(ii - GetNodeGroupsTag() + 1);
               SMESH::SMESH_GroupBase_var aNewGroup = SMESH::SMESH_GroupBase::_duplicate
                 ( myNewMeshImpl->createGroup( type, nameFromFile, aShape, predicate ) );
+              delete [] nameFromFile;
               // Obtain a SMESHDS_Group object
               if ( aNewGroup->_is_nil() )
                 continue;
@@ -4770,6 +4801,7 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
                 aDataset->CloseOnDisk();
                 Quantity_Color aColor( anRGB[0], anRGB[1], anRGB[2], Quantity_TOC_RGB );
                 aGroupBaseDS->SetColor( aColor );
+                delete [] anRGB;
               }
             }
           }
@@ -4787,7 +4819,7 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
       }
 
       // read Sub-Mesh ORDER if any
-      if( aTopGroup->ExistInternalObject( "Mesh Order" ) ) {
+      if ( aTopGroup->ExistInternalObject( "Mesh Order" )) {
         aDataset = new HDFdataset( "Mesh Order", aTopGroup );
         aDataset->OpenOnDisk();
         size = aDataset->GetSize();
@@ -4803,6 +4835,7 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
             anOrderIds.back().push_back(smIDs[ i ]);
 
         myNewMeshImpl->GetImpl().SetMeshOrder( anOrderIds );
+        delete [] smIDs;
       }
     } // loop on meshes
 
@@ -4850,7 +4883,7 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
     SMESH_File meshFile( meshfile.ToCString() );
     if ( !meshFile ) // no meshfile exists
     {
-      SALOMEDS_Tool::RemoveTemporaryFiles( tmpDir.ToCString(), aFileSeq.in(), true );
+      SALOMEDS_Tool::RemoveTemporaryFiles( tmpDir.ToCString(), aFileSeq, true );
     }
     else
     {
@@ -4867,12 +4900,11 @@ bool SMESH_Gen_i::Load( SALOMEDS::SComponent_ptr theComponent,
 
   // creation of tree nodes for all data objects in the study
   // to support tree representation customization and drag-n-drop:
-  SALOMEDS::Study_var                    study = theComponent->GetStudy();
-  SALOMEDS::UseCaseBuilder_wrap useCaseBuilder = study->GetUseCaseBuilder();
+  SALOMEDS::UseCaseBuilder_wrap useCaseBuilder = aStudy->GetUseCaseBuilder();
   if ( !useCaseBuilder->IsUseCaseNode( theComponent ) ) {
     useCaseBuilder->SetRootCurrent();
     useCaseBuilder->Append( theComponent ); // component object is added as the top level item
-    SALOMEDS::ChildIterator_wrap it = study->NewChildIterator( theComponent );
+    SALOMEDS::ChildIterator_wrap it = aStudy->NewChildIterator( theComponent );
     for (it->InitEx(true); it->More(); it->Next()) {
       useCaseBuilder->AppendTo( it->Value()->GetFather(), it->Value() );
     }
@@ -4932,22 +4964,16 @@ void SMESH_Gen_i::Close( SALOMEDS::SComponent_ptr theComponent )
 {
   if(MYDEBUG) MESSAGE( "SMESH_Gen_i::Close" );
 
-  // set correct current study
-  SALOMEDS::Study_var study = theComponent->GetStudy();
-  if ( study->StudyId() != GetCurrentStudyID())
-    setCurrentStudy( study, /*IsBeingClosed=*/true );
-
   // Clear study contexts data
-  int studyId = GetCurrentStudyID();
-  if ( myStudyContextMap.find( studyId ) != myStudyContextMap.end() ) {
-    delete myStudyContextMap[ studyId ];
-    myStudyContextMap.erase( studyId );
-  }
+  delete myStudyContext;
+  myStudyContext = 0;
 
   // remove the tmp files meshes are loaded from
   SMESH_PreMeshInfo::RemoveStudyFiles_TMP_METHOD( theComponent );
 
-  myCurrentStudy = SALOMEDS::Study::_nil();
+  // Clean trace of API methods calls
+  CleanPythonTrace();
+
   return;
 }
 
@@ -4980,7 +5006,6 @@ char* SMESH_Gen_i::IORToLocalPersistentID( SALOMEDS::SObject_ptr /*theSObject*/,
                                            CORBA::Boolean        /*isASCII*/ )
 {
   if(MYDEBUG) MESSAGE( "SMESH_Gen_i::IORToLocalPersistentID" );
-  StudyContext* myStudyContext = GetCurrentStudyContext();
 
   if ( myStudyContext && strcmp( IORString, "" ) != 0 ) {
     int anId = myStudyContext->findId( IORString );
@@ -5008,7 +5033,6 @@ char* SMESH_Gen_i::LocalPersistentIDToIOR( SALOMEDS::SObject_ptr /*theSObject*/,
                                            CORBA::Boolean        /*isASCII*/ )
 {
   if(MYDEBUG) MESSAGE( "SMESH_Gen_i::LocalPersistentIDToIOR(): id = " << aLocalPersistentID );
-  StudyContext* myStudyContext = GetCurrentStudyContext();
 
   if ( myStudyContext && strcmp( aLocalPersistentID, "" ) != 0 ) {
     int anId = atoi( aLocalPersistentID );
@@ -5024,7 +5048,6 @@ char* SMESH_Gen_i::LocalPersistentIDToIOR( SALOMEDS::SObject_ptr /*theSObject*/,
 
 int SMESH_Gen_i::RegisterObject(CORBA::Object_ptr theObject)
 {
-  StudyContext* myStudyContext = GetCurrentStudyContext();
   if ( myStudyContext && !CORBA::is_nil( theObject )) {
     CORBA::String_var iorString = GetORB()->object_to_string( theObject );
     return myStudyContext->addObject( string( iorString.in() ) );
@@ -5042,7 +5065,6 @@ int SMESH_Gen_i::RegisterObject(CORBA::Object_ptr theObject)
 
 CORBA::Long SMESH_Gen_i::GetObjectId(CORBA::Object_ptr theObject)
 {
-  StudyContext* myStudyContext = GetCurrentStudyContext();
   if ( myStudyContext && !CORBA::is_nil( theObject )) {
     string iorString = GetORB()->object_to_string( theObject );
     return myStudyContext->findId( iorString );
@@ -5062,18 +5084,13 @@ void SMESH_Gen_i::SetName(const char* theIOR,
 {
   if ( theIOR && strcmp( theIOR, "" ) ) {
     CORBA::Object_var anObject = GetORB()->string_to_object( theIOR );
-    SALOMEDS::SObject_wrap aSO = ObjectToSObject( myCurrentStudy, anObject );
+    SALOMEDS::SObject_wrap aSO = ObjectToSObject( anObject );
     if ( !aSO->_is_nil() ) {
       SetName( aSO, theName );
     }
   }
 }
 
-int SMESH_Gen_i::GetCurrentStudyID()
-{
-  return myCurrentStudy->_is_nil() || myCurrentStudy->_non_existent() ? -1 : myCurrentStudy->StudyId();
-}
-
 // Version information
 char* SMESH_Gen_i::getVersion()
 {
@@ -5095,9 +5112,8 @@ void SMESH_Gen_i::Move( const SMESH::sobject_list& what,
 {
   if ( CORBA::is_nil( where ) ) return;
 
-  SALOMEDS::Study_var study = where->GetStudy();
-  SALOMEDS::StudyBuilder_var studyBuilder = study->NewBuilder();
-  SALOMEDS::UseCaseBuilder_var useCaseBuilder = study->GetUseCaseBuilder();
+  SALOMEDS::StudyBuilder_var studyBuilder = getStudyServant()->NewBuilder();
+  SALOMEDS::UseCaseBuilder_var useCaseBuilder = getStudyServant()->GetUseCaseBuilder();
   SALOMEDS::SComponent_var father = where->GetFatherComponent();
   std::string dataType = father->ComponentDataType();
   if ( dataType != "SMESH" ) return; // not a SMESH component