Creating fillet in CAMWorks

I'm trying to make a fillet cut path for my part in the picture. My normal methods of making a fillet using the multi-surface feature doesn't work because the bottom edge of the fillet is shorter than the fillet. Does anyone know how to make the cut for this feature?

Im not sure i understand why the multi-surface routine will not cut the part. Can you send me the part model and i will try to program it? If so email it to [email protected]