Hi jetblast,

> where as in MoI, it tried, but it didn't finish the deal ...

It looks like MoI's filleter got confused in the part of the process where it cuts away space in the main object.

When it runs into an error like that, it still returns the fillet surfaces that it was able to generate so you can use them, like OSTexo mentions above you can probably use the Trim command to cut the main object and then join the fillet into place in that case.

The geometry library that ViaCAD users does tend to handle a lot more fillet corner juncture type cases than MoI's though so it's not a bad idea to use it to assist with filleting like that.

- Michael