MultiPile error

Not sure if I’m doing something wrong here but I’m getting this if I run the MultiPipe command.

image multipipe.3dm (6.2 MB)

I do not think you are doing anything wrong - your curves are a little bit messy where they meet - the tangency is not very good so they actually intersect twice, but fixing that does not make that extra spur go away - I’ll add this to the pile for the developer. My wild guess of the moment is that the tangency or near tangency is hard to resolve and that the tool was perhaps made with ‘harder’ corners in mind.
Thanks for the example.

It looks like you can simply delete the point at the end of that spur to clean up, but the resulting object does self-intersect over the zone where both curves fit inside the radius.

RH-61515 MultiPipe - messy on tangent curves