Hi Leonard, thanks for attaching that file "Clerestory edge problem.3dm".

When I load that file I can definitely see that you have some edges not displayed there.

But they do seem to exist and are just hidden. If I click the Edit/Hide button located in the UI here:



immediately after loading your file, the edges are unhidden and then can be seen and picked.

What happens if you follow these exact steps:

1 - load your just attached file Clerestory edge problem.3dm

2 - push that hide button

Do you then see the edges?

- Michael