Hi TIG thank you very much for these plugins.

I dont know if you are aware that "THEY" broke something in their API which causes the extrude on rails to fail in 2017, its still working correctly in 2016.

Im not sure what the problem is, I have a singe cure with 2 rails that join at a pint.
As I said its file in 2016. If you cant reproduce it let me know and I will try to upload my file.

Sorry for posting this, didn't read the latest posts.
Feeling stupid now.

... Simon