I experienced the same issue when I was doing a BGA fanout. I suspect the problem migth be with floating point dimensions comparison as when I decreased minimal clearance from 0.1 mm to 0.099 mm it went OK.
I experienced the same issue when I was doing a BGA fanout. I suspect the problem migth be with floating point dimensions comparison as when I decreased minimal clearance from 0.1 mm to 0.099 mm it went OK.