Points are not on my line?

I have created Reference points here but they are not on my line?

divide_line.dyn (103.3 KB)Ring.rfa (648 KB)

The parameter space domain is 0.0 ~ 1.0 (unless you’re in the Revit API :joy: :man_facepalming:) so your values will position points in outer space relative to your curve. Modify your range syntax according to this domain and it should work as expected.