I can’t rotate the pipes i have selected, indeed, it says it’s Revit.Element.Element and the node SetRotation won’t work coz it attends Revit.Element.FamilyInstance …
I tried converting theses Element to Family Instance but it seems that as it’s Pipes (original family from Revit), it won’t work.
Did anyone already have this problem ? thanks for your precious help
What is the error messages?
Does it work if you only select one pipe?
Becuase I think that you feed the “Line.ByStartopoint” with a list when it only wants one input.