almost mirror image fillet on other side of part will not cooperate

I am trying to put in a fillet on the other side of my model (see Capture 1).  I have placed a fillet on the right (VarFillet7) but am having trouble with filleting similar geometry on the left side of the part.  The previous fillet geometry (VarFillet3 & VarFilet4, see Capture 2) on both side are basically the same variable radius fillet (see Capture 3).  The working fillet on the right (VarFillet7) which I am having trouble producing on the left is also a variable radius fillet (see Capture4).  However when I try the same basic arrangement for the one on the left I get the an error message (see Capture 5).

Anybody have any hints?

David (I'd like to buy a vowel please) Hurayt

SolidworksParts And Features