diff --git a/src/GEOMBase/GEOMBase_Helper.cxx b/src/GEOMBase/GEOMBase_Helper.cxx
index 114ff2f53..d62fc63cd 100755
--- a/src/GEOMBase/GEOMBase_Helper.cxx
+++ b/src/GEOMBase/GEOMBase_Helper.cxx
@@ -1088,12 +1088,14 @@ void GEOMBase_Helper::addSubshapesToFather( QMap<QString, GEOM::GEOM_Object_var>
     {
       if ( !anOp->_is_nil() ) {
 	GEOM::GEOM_Object_var aFatherObj = anOp->GetMainShape( it.data() );
+	if ( !aFatherObj->_is_nil() ) {	
 	GEOM::GEOM_Object_var aFindedObject = findObjectInFather(aFatherObj, it.key() );
       
 	//Add Object to study if its not exist
 	if ( aFindedObject == GEOM::GEOM_Object::_nil() )
 	  GeometryGUI::GetGeomGen()->AddInStudy(GeometryGUI::ClientStudyToStudy(aDStudy),
 					      it.data(), it.key(), aFatherObj );
+	}
       }
       else {
 	//cout << " anOperations is NULL! " << endl;