Multipipe error from det of curves after trimming with brep

Hi, I am currently trying to make an egg like structure with multipipe. I used the the trim with brep on a group of voronoi cells to to remove the lines that were part of the original brep. I did this because I wan to use the original brep as a shell for the interior structure made by the multipipe. for some reason I keep getting “1. Solution exception:points must contain at least 1 point” but when I use normal pipe it works fine. I am new to grasshopper so I assume there is a simple fix.
Thank you!
unnamed.gh (13.2 KB)

No error in Rhino 8 SR15 2024-12-10 but there are a few places where you will have to clean up the curves. The spikes are a result of short segments / points being to close to each other.

What Rhino version are you using?