if( retVal == SMESH::SMESH_MeshEditor::EXTR_OK )
{
SMESH::MeshPreviewStruct_var aMeshPreviewStruct = meshEditor->GetPreviewData();
if( retVal == SMESH::SMESH_MeshEditor::EXTR_OK )
{
SMESH::MeshPreviewStruct_var aMeshPreviewStruct = meshEditor->GetPreviewData();