SU crashes when exporting as .dxf file

[Alohaa]

Hi,

Recently SU crashes every time I try to export an object as .dxf.
I have tried 3 times.

Is there a known solution for that problem?

Incidentally, there is a problem with this object that may have something to do with the crash:
there are 2 holes in it. When I look at it from above, I can only see one hole; I have to rotate a little in space to make the second one visible.

I then copied the object into a new SU file: I can see both holes and the export also works!

Update: now, even if I close SU normally, I get the message that it has crashed!!

Kind regards
Alohaa