Michael <<In the meantime the easiest workaround is to just draw a circle in a case like this and just delete the square rather than using fillet - the result you are looking for is a full circle, right?>>


I posted a silly example,but there are also many situations when you got already modeled complex solids and need to fillet two squared profiles like the example

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let me say you how i found useful new tool -ISO- for extracting isocurves from a surface.This is not only a quick way to cut a surface but also to refine or rebuilt it switching from sweep to network or loft
there is an half a month i'm working on a heavy and difficult model,and still need another one to finish,sometime i believed to surrender...without ISO tool i couldn't do some surfaces
thank you Michael

M