Hi Pilou,

re:
> Alas no same result!
> In Solid++ or Acis !

Hi Pilou, here are the steps I'm following.

Step 1 - load your file kub05.3dm using the Apr-8-2023 v5 beta.

Looks like this:


Then i selected the edge you indicated:


And then I ran the Fillet command and put in radius = 3, I get the glitch that you saw:



After the fillet command has been completed if I now save to a .3dm file and reload it, the glitch is gone. Looks like this:



Do you see different results with these same steps?

- Michael