It maybe because your passing in a nurbscurve, not a curve or list of curves.
try using Curve.ApproximateWithArcAndLineSegments node after your nurbscurve.
see post number 3 in this thread.
It maybe because your passing in a nurbscurve, not a curve or list of curves.
try using Curve.ApproximateWithArcAndLineSegments node after your nurbscurve.
see post number 3 in this thread.