From 1fb3ff621ac19da15742a5e8b9253b594977d14a Mon Sep 17 00:00:00 2001
From: eap <eap@opencascade.com>
Date: Mon, 25 Mar 2019 18:50:14 +0300
Subject: [PATCH] #16648 [CEA] RadialQuadrangle algorithm hypothesis change
 requires a Clear Mesh Data beforehand

---
 src/SMESH/SMESH_Mesh.cxx | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/SMESH/SMESH_Mesh.cxx b/src/SMESH/SMESH_Mesh.cxx
index 1ea9d48f8..7cc790b44 100644
--- a/src/SMESH/SMESH_Mesh.cxx
+++ b/src/SMESH/SMESH_Mesh.cxx
@@ -1191,6 +1191,13 @@ void SMESH_Mesh::NotifySubMeshesHypothesisModification(const SMESH_Hypothesis* h
   if ( !GetMeshDS()->IsUsedHypothesis( hyp ))
     return;
 
+  bool toCallBack = true;
+  if ( _callUp && hyp && NbNodes() == 0 ) // for not loaded mesh
+  {
+    _callUp->HypothesisModified( hyp->GetID() );
+    toCallBack = ( NbNodes() > 0 );
+  }
+
   SMESH_Algo *algo;
   const SMESH_HypoFilter* compatibleHypoKind;
   std::list <const SMESHDS_Hypothesis * > usedHyps;
@@ -1258,7 +1265,7 @@ void SMESH_Mesh::NotifySubMeshesHypothesisModification(const SMESH_Hypothesis* h
   HasModificationsToDiscard(); // to reset _isModified flag if mesh becomes empty
   GetMeshDS()->Modified();
 
-  if (_callUp && hyp)
+  if ( _callUp && hyp && toCallBack )
     _callUp->HypothesisModified( hyp->GetID() );
 }
 
-- 
2.30.2