I have some strange problems too. I want to measure the hole with Auto Circle and the graphics of tip paths show some strange paths. If I have smaller number of hits, paths are shown on different heights, if I have a bigger number of hits (over 10) the graphics show less paths then defined, and the machine takes less points for circle (if there is 6 hits on graphics it takes 6 hits). I hope the pictures are big enough to see my problem.
