I tried to import a shape with curves from Onshape.

It works with straight lines. But as soon as I add a curve, everything breaks.

PS: I posted this here because it's related, and the bug report is not closed yet. :)

I found the way to get proper DXF from Inkscape:

After you press "Save" in Save as... dialogue window

In next window you need:

clear these two checkboxes

use base unit "mm" (you still need scale 0.001 rule)

I used R14 format of DXF but maybe it will works with R12 too

Thanks Jharwin, you can close this bug report

Vasyl Skral thanks for the report and attaching the files. It looks like the Inkscape exported dxf you provided is not a closed polygon. We currently don't support this as mentioned in the documentation here - https://docs.flux.ai/reference/reference-inspector-assets#dxf

You can upload your dxf using an online dxf viewer like https://sharecad.org/ - and you will see it contains two polygon. (see screenshot)