Help understanding why fusion is failing

[chennes]

I've got a file generated from an OpenSCAD import... it looks like this:

FusionCorrect.png (218.02 KiB) Viewed 217 times

But if I try to do a Fusion operation on the parts (it's the outer gear portion and the inner portion with the holes in it), I get:

FusionFailure.png (205.38 KiB) Viewed 217 times

Can someone hep me understand why that operation is failing? The FCStd is too big to post directly here, so here's a link to it:
https://plsok-my.sharepoint.com/:u:/g/p ... w?e=fjca0O



OS: Windows 10 Version 2009
Word size of FreeCAD: 64-bit
Version: 0.20.24734 +6 (Git)
Build type: Debug
Branch: themeEngine
Hash: b902ec1b1a896f7ae420bf8a4628e57267c26552
Python version: 3.8.6+
Qt version: 5.15.1
Coin version: 4.0.1
OCC version: 7.5.0
Locale: English/United States (en_US)

[Willem]

In Group001 are two identical circles, circle006 and circle014. Delete circle014 and all is good

[chennes]

Awesome, thanks for your help tracking that down - best of all, it's not a bug in FreeCAD, but in the OpenSCAD file