Self-intersected curve problem

I have a problem with hatching and extruding curves that are self-intersecting.

I tend to get the same problem whenever I draw circles or non-linear curves…

Geometry.3dm (594.3 KB)

Hello- you have several curves that are joined to copies of themselves or just piled on top - use SelSelfIntersectingCrv and SelDup to find these.