From a51f8ed307a8820bd78d74043002ee168993bb73 Mon Sep 17 00:00:00 2001
From: Matthias Hochsteger <mhochsteger@cerbsim.com>
Date: Mon, 14 Jun 2021 10:09:49 +0200
Subject: [PATCH] fix meshing empty meshes

---
 libsrc/meshing/meshfunc.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libsrc/meshing/meshfunc.cpp b/libsrc/meshing/meshfunc.cpp
index 8bf85206..08f0b234 100644
--- a/libsrc/meshing/meshfunc.cpp
+++ b/libsrc/meshing/meshfunc.cpp
@@ -315,6 +315,9 @@ namespace netgen
            throw NgException ("Stop meshing since boundary mesh is overlapping");
 
 
+     if(mesh3d.GetNDomains()==0)
+         return MESHING3_OK;
+
      Array<Mesh> meshes(mesh3d.GetNDomains()-1);
      auto first_new_pi = mesh3d.Points().Range().Next();