Solution exception:Object reference not set to an instance of an object.

Hey all! I am quite new to the Kangaroo and I have probably a few very basic problems that I have trouble solving....

As I was trying to do the relaxation on intersecting tube things, I got two error message from the Spring and Kangaroo:

1. Data conversion failed from Boolean to Curve

1. Solution exception:Object reference not set to an instance of an object.

I have attached the GH file if anyone knows how to fix these problem I would be appreciated.

Thanks