I wanted a pipe tool like the Rhino one so I downloaded your script, pipe.zip. This script works great except that it will not cap a pipe with an outer radius of 0.55 and and inner radius of 0. It works fine with 0.54 and 0.56, just not 0.55. (0.549 and 0.551 work as well) Very strange.

Add to that 0.425 and 0.426.

Hi Steve, that is odd, definitely seems to be a bug. It appears to be getting confused about whether the ends are closed or not in those cases.

It looks like the Planar command can cap it successfully though, so to fix it select the uncapped pipe and run Construct > Planar - that should fill in planar surfaces at the uncapped ends.

I've added this to my list to look at in v3, thanks for reporting it.

- Michael