# Yorik, Yorik, I am using windows. I have compiled IfcOpenShell (git) using MS Visual C++ 2010 Express. I am using :- OpenCascade 6.7.1 SwigWin 3.0.2 Python 2.7.8 Boost 1.56.0 FreeCAD 0.14 (64bit) All this is running on a Windows Server 2003 R2 x64. FreeCAD 32bit does not seem to work on a 64bit machine. I have compiled everything Win32 but am running FreeCAD 64bit. Kind regards