We (FreeCAD) are facing some problems with occt7.1.0 on windows. While this version works on linux and mac, windows has some problems with Handles.
Converting argument 2 of "opencascade::handle<TColgp_HArray1OfPnt>" in "Handle_TColgp_HArray1OfPnt &" not possible
It was possible to overcome this problem by using Handle(TColgp_HArray1OfPnt) instead of Handle_TColgp_HArray1OfPnt. But we also facing some run-time warnings:
access violation - no RTTI data!
There is no such problem with occt7.0.0
Maybe you have some ideas, what changes between 7.0.0 and 7.1.0 could be related to this problem.