From a80d9e5ef84dca262c62c40b642e2ae5bf592418 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Sat, 28 May 2022 12:08:44 +0200
Subject: [PATCH] Fem: [skip ci] fix deleting Result object if its children has
 been deleted beforehand

---
 src/Mod/Fem/femviewprovider/view_result_mechanical.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Mod/Fem/femviewprovider/view_result_mechanical.py b/src/Mod/Fem/femviewprovider/view_result_mechanical.py
index 8c514528cdb2..9565b93797db 100644
--- a/src/Mod/Fem/femviewprovider/view_result_mechanical.py
+++ b/src/Mod/Fem/femviewprovider/view_result_mechanical.py
@@ -63,6 +63,8 @@ def claimChildren(self):
 
     def onDelete(self, feature, subelements):
         children = self.claimChildren()
+        filtered = filter(lambda obj: not obj is None, children)
+        children = list(filtered)
         if len(children) > 0:
             # issue a warning
             bodyMessage = "The results object is not empty, therefore the\nfollowing referencing objects might be lost:\n"