From 57af37f78b56b87216f62d45537e0ad3e7197cf3 Mon Sep 17 00:00:00 2001
From: mpv <mpv@opencascade.com>
Date: Tue, 22 May 2018 15:49:42 +0300
Subject: [PATCH] Fix for the issue #2456 : Fatal error when remove part

---
 src/XGUI/XGUI_DataModel.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/XGUI/XGUI_DataModel.cpp b/src/XGUI/XGUI_DataModel.cpp
index df96b1826..2f92a30f2 100644
--- a/src/XGUI/XGUI_DataModel.cpp
+++ b/src/XGUI/XGUI_DataModel.cpp
@@ -223,8 +223,10 @@ void XGUI_DataModel::processEvent(const std::shared_ptr<Events_Message>& theMess
         int aRow = aRootDoc->size(aGroup, true);
         if (aGroup == aRootType) {
           // Process root folder
-          removeRow(aRow + aNbFolders);
-          rebuildBranch(aNbFolders, aRow);
+          // remove optimization due to the issue #2456
+          //removeRow(aRow + aNbFolders);
+          //rebuildBranch(aNbFolders, aRow);
+          rebuildDataTree();
         } else if (aGroup == ModelAPI_Folder::group()) {
           rebuildDataTree();
         } else {
-- 
2.30.2