Hi Rudy, fillet generally won't work properly if there are small or compressed areas that would cause the fillet pieces to run over top of each other.

Here is one such problem area in your model:



There isn't enough room in there to fit simple fillet pieces.

Also areas that have a very tightly curved bend in them tend to cause similar "not enough room" problems as well.

These types of situations need to be avoided in order to get successful fillets.

In this case some of the edges will fillet if you use a small enough radius, like the outside edge of the shape and all the bottoms of the sphere pieces will fillet at a radius of 0.01 .

- Michael