diff --git a/src/GEOM_I/GEOM_IBlocksOperations_i.cc b/src/GEOM_I/GEOM_IBlocksOperations_i.cc
old mode 100644
new mode 100755
index 50c4e6fd3..55a9c3c70
--- a/src/GEOM_I/GEOM_IBlocksOperations_i.cc
+++ b/src/GEOM_I/GEOM_IBlocksOperations_i.cc
@@ -766,12 +766,15 @@ GEOM::GEOM_Object_ptr GEOM_IBlocksOperations_i::GetNonBlocks
   //Get the result
   Handle(GEOM_Object) aFaces;
   Handle(GEOM_Object) anObject = GetOperations()->GetNonBlocks(aShape, aFaces);
-  if (!GetOperations()->IsDone() || anObject.IsNull())
+  if (!GetOperations()->IsDone())
     return aGEOMObject._retn();
 
   if (!aFaces.IsNull())
     theNonQuads = GetObject(aFaces);
 
+  if (anObject.IsNull())
+    return aGEOMObject._retn();
+
   return GetObject(anObject);
 }