From 45aef7b028a54c5420db49ff3284fc7377475e90 Mon Sep 17 00:00:00 2001
From: Bernd Hahnebach <bernd@bimstatik.org>
Date: Sun, 19 Apr 2020 21:56:35 +0200
Subject: [PATCH] FEM: meshtools, init empty node numbers in face search

---
 src/Mod/Fem/femmesh/meshtools.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Mod/Fem/femmesh/meshtools.py b/src/Mod/Fem/femmesh/meshtools.py
index e8bc64176417..c3f1cd0a964a 100644
--- a/src/Mod/Fem/femmesh/meshtools.py
+++ b/src/Mod/Fem/femmesh/meshtools.py
@@ -1426,6 +1426,7 @@ def build_mesh_faces_of_volume_elements(
         FreeCAD.Console.PrintLog("VolElement: {}\n".format(veID))
         vol_node_ct = len(femelement_table[veID])
         face_node_indexs = sorted(face_nodenumber_table[veID])
+        node_numbers = ()
         if vol_node_ct == 10:
             FreeCAD.Console.PrintLog("  --> tetra10 --> tria6 face\n")
             # node order of face in tetra10 volume element