Edge fillet - Seems to have trouble?

All, I have a honeycomb solid shape where I want to fillet all the vertical edges, except for the internal tangent ones and the ends of the ribs.

I found and filtered out all these elements to get the list I want to fillet but when I choose the support and even just a single edge which it should fillet easily, it's failing.

The edge selection and filtering support solid all correspond.... any ideas?

 

Thanks