Why isn't FilletEdge working?

So I tried many fixes but nothing is working. Im using a small fillet, like .4mm. Even FilletEdge one by one won’t work.
FilletEdge.3dm (4.4 MB)


Hi Aiden - if you look closely at the edges of the cross shapes, you’ll see there’s a step that should not be there:

(I am moving this to the Rhino for Windows category.)


Oh. No. What do you suggest to fix it?

Hi Aiden - in the long run, just being a little more careful - for now, recreate one of those shapes as clean curves, extrude them, copy to the locations then UntrimHoles the ones to replace and BooleanDifference to make a new hole.