Surface with Missing Edge

I’m not sure how I did it but I created a surface where one of the edges is missing.Problem60.3dm (226.7 KB)
In this image, you can see the gap of the black line at the right.

Is this correctable?

Hi Jim - UntrimBorder.



What exactly is happening with this command. I do not understand it from the help files.


Hi Jim - it removes the outer trim curve on a surface. My guess is the weird edge was caused by joining this surface to some other surface - but just guessing. Joining can force the edge away from the surface and untrimming will restore the ‘natural’ surface edge.