Filleting a Böbbel

 From:  Lara (MALA)
10113.1 
Hi, before I try your new suggestion on Modelling a Böbbel I faced me with a new "little" Böbbel. Filleting. It is a simpler object.
Why isn´t it possible to fillet the yellow lines?
best, Mala


EDITED: 10 Feb 2021 by MALA