Hi Leonard,

> I found the same issue occurs with the Fillet tool. I will reduce the
> face and radius dims.

Over here, Fillet seems to work with Radius 0.25 with "Straight corners" set to OFF.



But not with straight corners on.

But maybe this is also one of these situations where you can't have straight corners on without causing a problem where pieces just don't match up. Check out a description of the problem here:
http://moi3d.com/1.0/docs/moi_command_reference7.htm#fillet

- Michael