Linux Ubuntu 12.04.1
FreeCAD 0.13 rev 1766 (GR)
I just compiled and installed 6.5.4 and am using it in FreeCAD 0.13.
When I reach some unknown level of complexity, when using the CUT function, surfaces start going missing.
(I'm only guessing, but it seems like that's the kind of thing to expect if the program had run out of memory.)
(Please run the attached file DEMO.fcstd in FreeCAD.)
Choose Part workbench
Make a cut of two shapes
At the point where the shapes intersected, note how the appropriate surfaces are missing, and an inappropriate one is still there.
Is there anything I can do about that?