Planar curves/surface fail

As per the screen shot, I’m trying to create surfaces from an extracted curve but it keeps failing. I then projected the curves to a c plane thinking that would solve the problem but still no planar surface creation. Is there some analysis to be done on this? It seems rather simple after all and I’m a bit dismayed.

ArgoFlex.3dm.zip (317.2 KB)

Look down in the Properties panel.
It’s an “open” curve.
That’s the problem.

Use CrvEnd and CrvStart to place points at both ends of the gap/overlap so you can find them and fix them.

I tried both those commands but all that happens is the curve(s) is highlighted.

I don’t know how to use this technique.

:pensive:

Wait, hang on … I zoomed in very tight and found some end points. That’s bizarre, why would a joined curve have a tiny gap in it? It there some setting to prevent that?

Oh … damn! They are joined just not completely. That’s a bit disconcerting as I’d mirrored the curves and expected them to meet. A small defect is not easily seen.