Hi Sven,

re:
> Flow can result in difference results running without changes to what is being flowed ?

The flow result is dependent on where you click on the base surface and target surface.

If you click in different areas that can give different results.

You need to click near the corner of a surface but not quite exactly on the corner, a little bit along one edge as described here:
https://moi3d.com/4.0/docs/moi_command_reference8.htm#flow

Looking at the file I think the self-intersections are in the B letter here:



- Michael