Please post .3dm file.
- B

Hi Involute, if you don't want to share the file publicly here you can e-mail it to me privately at moi@moi3d.com instead.

But yes as Brian says I'll need to take a look at the file to give you proper feedback on it.

Looking at a screenshot I can only make some general guesses - with a very sharp thin thing like that even a little tiny fillet can eat away a quite large area. You might try even smaller than 0.05 . Also if the filleter is having problems dealing with how to end the fillets you might extract those sharp pieces from the main object using Edit > Separate and then try the fillet on the separated part, that might give you something to work with since the filleter won't have to deal with how the fillet should interact with neighboring faces on the sides.

- Michael

Here you go.

Hi Involute, I tested it with a fillet of 0.05 units and it's working fine for me over here, 3DM file is attached. You do have to make sure to select the entire sequence of edges though, there are also 3 edges in these areas:



0.05 is about all that will fit, much larger and it will run out of room here:



- Michael

Hi Involute, I don't know if this is important or not but also note that the fillet will eat away some material underneath the other solid disk shape here:



- Michael

Aah, I didn't realize I had to select all the edges. Works for me now, too. Thanks.

> the fillet will eat away some material underneath the other solid disk shape here:

Thanks for pointing that out. Fortunately it won't matter in my application.