I have a custom transformer to fit rectangles into a polygon. The inputs are the polygon, and the rectangles. They go into a spatial filter which checks for "contains within", failed features are rotated and looped back to the candidate rectangles port to see if they will pass the "contains" filter again. I set the "maximum number of iterations" parameter under advanced to equal 4. The issue is that the transformer will just spin the failed rectangles infinitely instead of just 4 times.