Hi Marco, thanks for testing it!

re: problem file MF2018.STEP - thanks for sending that, I'll investigate it. There are cases where it will be normal for the progress bar to move unevenly because it goes in steps per object processed so if you have say 1000 tiny objects and 1 huge object it's going to move unevenly in that case.

But it seems that something's getting stuck in a really long low level loop for that one, possibly a too tight tolerance being used, I'll see. Since V3 is similarly afflicted it doesn't look like a newly introduced bug.

- Michael