Structural Column by Curve is generating error


I am trying to place column family by curve along the wall. I am extracting the curves by intersection of the middle surface and normal plane on column location point. But each time I am trying to place the column family, I am getting the above mentioned Revit error. Can someone please suggest why I am getting it and how can I bypass this error. I have also attached the .dyn file with it.

Structural Framing.dyn (125.0 KB)

I used Clockwork here.