GH Python iteration over non-sequence of type Guid.....AddSweep1

Dear All

Project Discription:

I wanted to create a sweep surface on the faces of a icosahedron(image Added, Created with WB). The GH Script (File Added) converts mesh into surfaces and then uses the Python Script to create a Sweep surface over each of the faces.

The Python script firstly creates an arc over each of the lines keeping the origin as the center. then 2 of the 3 arcs are selected to sweep and create a curved surface. 

The Problem(Seen in the GH Python Script) is that the run-time error shows :

iteration over non-sequence of type Guid......when the Sweep command is executed.

i will be glad id someone can go through it and help me. i think it is something to do with tree access, not sure.

Regards

Arjun