Object exports as STL, 3mf fails: "The file writing plug-in failed."

I’m 3d printing the STL file right now and it looks good. Let me know what other data I can provide.

Version 8 SR14 (8.14.24345.15001, 2024-12-10)
3mf-fail.3dm (769.6 KB)

*.3mf doesn’t seem to like your threaded nut but anyway, check these files:

nut.3mf (97.8 KB)
a.3mf (11.2 KB)
b.3mf (14.2 KB)
c.3mf (11.8 KB)
d.3mf (5.5 KB)

Odd – I use that same nut assembly in other pieces that export in 3MF just fine. I literally copied one (that is printing right now) shortened the column above the nut assembly, and added the big flat cylinder. I also flipped the nut assembly 180 degrees for this filed to improve printing, flipped it back just now and it still fails to export.

The model for the nut is one I downloaded from McMaster Carr. I’ve exported seven or eight models with that nut in the past couple of days and they all export just fine to 3MF.