Hi there, I know this is an old post but just to help people that still has this problem. What I do is first repairing the STL with netfabb online service. They make sure the stl is a shell in there insperction and repairing. You can then import the stl into freecad and follow the procedure above. I...

Hi Mark, Thank you for the reply, I had an idea that was the problem. But I have just installed version 0.17 pre-release. I opened the model and immediately it complained that there was a problem with the sketch. I let it do the changes to the new version as I do not know yet what to do manually. So...

Hi there, First of all my environment: OS: Windows Word size of OS: 32-bit Word size of FreeCAD: 32-bit Version: 0.16.6704 (Git) Build type: Release Branch: releases/FreeCAD-0-16 Hash: 0c449d7e8f9b2b1fb93e3f8d1865e2f59d7ed253 Python version: 2.7.8 Qt version: 4.8.6 Coin version: 4.0.0a OCC version: ...