From 6623d942cd8d35cd1fac0b98db3d630bec0d20f7 Mon Sep 17 00:00:00 2001
From: dmv <dmv@opencascade.com>
Date: Tue, 5 Feb 2008 14:44:45 +0000
Subject: [PATCH] IPAL 18096

---
 src/EntityGUI/EntityGUI_SubShapeDlg.cxx | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/EntityGUI/EntityGUI_SubShapeDlg.cxx b/src/EntityGUI/EntityGUI_SubShapeDlg.cxx
index d4c0e9ae1..ae82cc4c1 100644
--- a/src/EntityGUI/EntityGUI_SubShapeDlg.cxx
+++ b/src/EntityGUI/EntityGUI_SubShapeDlg.cxx
@@ -524,6 +524,13 @@ GEOM::GEOM_IOperations_ptr EntityGUI_SubShapeDlg::createOperation()
 bool EntityGUI_SubShapeDlg::isValid( QString& msg )
 {
   bool isOk = false;
+  Handle(SALOME_InteractiveObject) IO = firstIObject();
+  Standard_Boolean testResult;
+  myObject = GEOMBase::ConvertIOinGEOMObject( IO, testResult );
+  if ( !testResult || myObject->_is_nil() )  {
+    updateButtonState();
+    return isOk;
+  }
   if ( !myObject->_is_nil() ) {
     if ( isAllSubShapes() )
       isOk = true;