Loft problem - Solution exception:Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index

I want to build this Voronoi structure on a patch, but it doesn’t loft it.
Additional lines are still being created, but I don’t know why. Where is my mistake can you help me please.

![Bildschirmfoto 2020-05-17 um 02.09.31|690x350](upload://c9

R8HdwNhoJWO8oNuKCUTpf6b9C.png) (33.8 KB)

Moved to Grasshopper forum.

No internalized geometry.
Annotation 2020-05-16 173817

Thats not the problem. The internalized geometry is a random patch.

Looks like you duplicate post…

Concerning the solution exception, do you work with macOS Rhino? If so, I’ve already encountered this error numerous times, especially when using the GHPython component.
It usually disappears when you simply restart Rhino/Grasshopper. I’ve no idea where it comes from!

It is the problem, we should be looking at the same patch.