Hello,
I’m writing here because there’s a problem connected with my model.
“Solution exception: object reference not set to an instance of an object”
ReadFromFile component doesn’t work only with this file. With another models it works properly.
Maybe, do you have idea what can be a reason?
The issue seems to be related to some directed line support.
You have spotted an other bug.
Consider using Group Line support for the time being
Perfect, thanks for finding it! 
It will be for sure this, I’ve helped today with creating some script of steel stadium roof and line support type is not supported.
Line support group have to be used in FD API atm.
Amazing!
Version 22.10.0 should have this issue fixed and you will be able to use Directed Line Support