Fillet problem

 From:  andras
Hi Michael!

It would be a litle proble, I can not use the fillet command in this cases:
-rear view mirror
-head light

What would be the cause of problem. maybe the geometry??? I dont dont know.

And What about the concave fittng (fillet) for example: steel joint?

EDITED: 7 Aug 2007 by ANDRAS