Curve.PointAtParameter Issue

Hello everyone!
I am designing a structural system which is driven by model edges taken from Revit.
I found this issue with the current model
-When I create Curve.PointAtParameter I don’t have any points on the end of the curve though I have code Block 0…11…#12. I cannot create a smooth loft surface because the points are not at full length of the nurbs Curve.
Any clues about this issue?

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Curve parameter values typically range from 0 to 1. Also, see Dynamo Primer about Series shorthand syntax. If you are still having issues you could always try appending Curve.Endpoint points to your list(s).