From 98a15bcc9de302710d4b7303c8a3cdaa2174c05a Mon Sep 17 00:00:00 2001
From: marioalexis <mario.passaglia@gmail.com>
Date: Wed, 13 Nov 2024 09:08:40 -0300
Subject: [PATCH] Fem: Avoid legacy Netgen meshing if there is no referenced
 shape - fixes #17814

---
 src/Mod/Fem/App/FemMeshShapeNetgenObject.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Mod/Fem/App/FemMeshShapeNetgenObject.cpp b/src/Mod/Fem/App/FemMeshShapeNetgenObject.cpp
index a296b0b10b..5fa6536ea6 100644
--- a/src/Mod/Fem/App/FemMeshShapeNetgenObject.cpp
+++ b/src/Mod/Fem/App/FemMeshShapeNetgenObject.cpp
@@ -86,7 +86,11 @@ App::DocumentObjectExecReturn* FemMeshShapeNetgenObject::execute()
 
     Fem::FemMesh newMesh;
 
-    Part::Feature* feat = Shape.getValue<Part::Feature*>();
+    const Part::Feature* feat = Shape.getValue<Part::Feature*>();
+    if (!feat) {
+        return App::DocumentObject::StdReturn;
+    }
+
     TopoDS_Shape shape = feat->Shape.getValue();
 
     NETGENPlugin_Mesher myNetGenMesher(newMesh.getSMesh(), shape, true);