diff --git a/libsrc/interface/nginterface_v2.cpp b/libsrc/interface/nginterface_v2.cpp
index 550ce1a8..1c4c6395 100644
--- a/libsrc/interface/nginterface_v2.cpp
+++ b/libsrc/interface/nginterface_v2.cpp
@@ -102,9 +102,14 @@ namespace netgen
   */
 
   Ngx_Mesh :: ~Ngx_Mesh ()
-  {
+  { 
+    /*
+      // causes crashes when global variable netgen::mesh is destructed
+      // before visualization data 
+
     if (mesh == netgen::mesh)
       netgen::mesh = nullptr;
+    */
   }
 
   int Ngx_Mesh :: GetDimension() const