Hello wmayer! It's great - after today's update I can open my old files in FreeCAD 0.17 again! Thanks a lot, everything is fine - whatever has been done. As for 0.16, it still fails, but as others said this is probably a downward compatibility problem. Although I do not think I used any specific 0.1...

Dear Ulrich, thank you for your efforts!! I can open the file that you transferred to 0.16! As to the Sketcher: I am still experimenting with FreeCAD and trying different ways of getting to the desired results. Yes, I have tried the Sketcher for other parts and it gave me a hard time... Maybe I shou...

Hello,

I deleted both system.cfd and user.cfd (located in ~/.FreeCAD), restarted 0.16 and tried again - no difference, problem remains.

Regards
Jon

Hi bejant, thanks for your effort. I tried your file, but the problem remains unchanged. 0.16 opens it shortly - I can see my drawing for about 0.5 seconds - and then closes the file with an error message. As for 0.17 I get a freeze. The error message in 0.16 reads literally: "Traceback (most r...

Oh, and by the way, I will keep my hands off 0.17 for the moment when working on serious files, although some features look VERY promising to me and seem not to exist in 0.16 (such as the "addition / subtraction volume" property of sites). Thanks for the note.

Dear everybody, thanks a lot. I am impressed by by the large number of replies in such a short time and had not expected that. Well, so it seems my files are alright, but somehow the software does not run properly, obviously some problem with the underlying operating system. I apologize for bugging ...

Dear FreeCAD developers and forum users, I have spent quite time in recent weeks to get acquainted with FREECAD and try to find out in how far it can be used for 3D model building in my field of work - I am an environmental engineer and dealing with sewer networks. So far, I have been very impressed...