IPAL52450: Mesh generation fails due to viscous layers

src/SMESH/SMESH_MesherHelper.cxx

@@ -2328,11 +2328,12 @@ bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap &            theParam2
           while ( ++u_n != sortedBaseNN.end() && !isNodeInSubMesh( u_n->second, faceSubMesh ));
           sortedBaseNN.erase( sortedBaseNN.begin(), u_n );
         }
-        if ( u_n = --sortedBaseNN.end(), !isNodeInSubMesh( u_n->second, faceSubMesh ))
-        {
-          while ( u_n != sortedBaseNN.begin() && !isNodeInSubMesh( (--u_n)->second, faceSubMesh ));
-          sortedBaseNN.erase( ++u_n, sortedBaseNN.end() );
-        }
+        if ( !sortedBaseNN.empty() )
+          if ( u_n = --sortedBaseNN.end(), !isNodeInSubMesh( u_n->second, faceSubMesh ))
+          {
+            while ( u_n != sortedBaseNN.begin() && !isNodeInSubMesh( (--u_n)->second, faceSubMesh ));
+            sortedBaseNN.erase( ++u_n, sortedBaseNN.end() );
+          }
         if ( sortedBaseNN.empty() ) continue;
       }
 
@@ -2349,7 +2350,7 @@ bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap &            theParam2
         u2nn->second.push_back( u_n->second );
       }
     }
-    if ( theParam2ColumnMap.empty() )
+    if ( theParam2ColumnMap.size() < 2 )
       return false;
   }
 

src/SMESH/SMESH_subMesh.cxx

@@ -1735,6 +1735,8 @@ bool SMESH_subMesh::ComputeStateEngine(int event)
     case CHECK_COMPUTE_STATE:
       if ( IsMeshComputed() )
         _computeState = COMPUTE_OK;
+      else if ( _computeError && _computeError->IsKO() )
+        _computeState = FAILED_TO_COMPUTE;
       break;
     default:
       ASSERT(0);

src/SMESH_I/SMESH_Gen_i.cxx

@@ -1460,8 +1460,11 @@ SMESH::compute_error_array* SMESH_Gen_i::GetComputeErrors( SMESH::SMESH_Mesh_ptr
         // if ( sm->GetSubShape().ShapeType() == TopAbs_VERTEX )
         //   break;
         SMESH_ComputeErrorPtr error = sm->GetComputeError();
-        if ( error && !error->IsOK() && error->myAlgo )
+        if ( error && !error->IsOK() )
         {
+          if ( !( error->myAlgo ) &&
+               !( error->myAlgo = sm->GetAlgo() ))
+            continue;
           SMESH::ComputeError & errStruct = error_array[ nbErr++ ];
           errStruct.code       = -( error->myName < 0 ? error->myName + 1: error->myName ); // -1 -> 0
           errStruct.comment    = error->myComment.c_str();

src/StdMeshers/StdMeshers_Hexa_3D.cxx

@@ -371,8 +371,9 @@ bool StdMeshers_Hexa_3D::Compute(SMESH_Mesh &         aMesh,
     for ( int i = 0; i < 6; ++i )
     {
       const TopoDS_Face& sideF = aCubeSide[i]._quad->face;
-      if ( !SMESH_MesherHelper::IsSameElemGeometry( meshDS->MeshElements( sideF ),
-                                                    SMDSGeom_QUADRANGLE,
+      const SMESHDS_SubMesh* smDS =
+        proxymesh ? proxymesh->GetSubMesh( sideF ) : meshDS->MeshElements( sideF );
+      if ( !SMESH_MesherHelper::IsSameElemGeometry( smDS, SMDSGeom_QUADRANGLE,
                                                     /*nullSubMeshRes=*/false ))
       {
         SMESH_ComputeErrorPtr err = ComputePentahedralMesh(aMesh, aShape, proxymesh.get());