-// Copyright (C) 2007-2015 CEA/DEN, EDF R&D, OPEN CASCADE
+// Copyright (C) 2007-2016 CEA/DEN, EDF R&D, OPEN CASCADE
//
// Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
void ModifiedMesh (_PTR(SObject) theSObject, bool theIsNotModif, bool isEmptyMesh)
{
_PTR(Study) aStudy = GetActiveStudyDocument();
- if (aStudy->GetProperties()->IsLocked())
+ if ( !aStudy || aStudy->GetProperties()->IsLocked() )
return;
_PTR(StudyBuilder) aBuilder = aStudy->NewBuilder();