Kangaroo simulation Error (Index out of range)

Hello, I need some help.

I'm starting to use grashopper now, so this is probably a newbie question.

I am trieing to generate a roof structure out of already specify points

But I'm getting this error:

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

The error occurs when before I start the simulation.

Is anyone getting this same error?

Attached is a picture of the code and the grasshopper file itself. Make sure that before opening grasshopper the absolute tolerance of Rhino is changed to 0.001 (Tools ->options -> Document properties -> Units)

In advantage thank you very mutch!