Thanks it works now! Not sure why though but nevermind. I just started with a fresh Blender, ran the script and hit 'K'. Done I already tested various parts from B9 Aerospace, KAS, Mechjeb and ScanSAT. I added them to the big dictionary, but unfortunately none of them have worked so far. The script runs though. It imports all the parts until a modded part would show up, then it crashes. These parts still show up then.