Project curve onto face - Error: The multiplicities of other interior knots must be at most degree - 2

Revit
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Hi,
I’m very new to Dynamo (first project).
I want to project a curve onto a curved face (I have to build a vault for university), it projected nicely but I can’t transform it into a path that I could use to built the ribs of the vault (through profile along curve) or even use it as a path for a beam without the error:
The multiplicities of other interior knots must be at most degree - 2
Parameter name: knots

help
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It does with other, more simple surfaces but I can’t find out how to make it work with the vault surface.
Thanks for your help!

2

Hey, I think you need to rebuild your curve… extract points from the one you made and make a new one…

Alban is doing something similar at the end of this graph… Create floors from polycurves issue - #9 by Alban_de_Chasteigner

Hope that helps,

Mark