I've seen this bug for several versions and it's still present even in 2014. After viewing a corridor section, doing an inquiry, then clicking the Close button to get back the corridor is not able to be selected. It's "invisible" to the cursor. The only way I've found to get back to normal is to zoom out a bit, do a regen all, then a save. That's the only way to get the cursor to select the corridor again short of restarting C3D.
Has anyone else run into this very annoying bug? I can't recall what version I first noticed it in, but I think it was 2011 or 2012.
EDIT: Forgot to say this doesn't happen every time. I can't pinpoint what changes between tries, though. Usually, once it happens and I do the previous steps I can select it for a while. Then the bug hits again and I have to do the steps again.
I sure have and it is frustrating. The Corridors go into a non-selectable state arbitrarily on me at different times during design.
What I eventually found was that the Corridor would become selectable again by invoking the End Isolation command.
I put the End Isolation command on my right-click shortcut menu.
Have the issue here too, switching from Model Tab to Layout and back to Model usually works.
Also going to Corridor Name on Prospector>Rt. Click>Select.
Similar problem exists in R2013 & also I believe I have had this in R2012 (maybe also 2011).
Regen doesn't always work and selecting on prospector fixes it sometimes. I usually just rebuild the corridor via prospector then it is selectable in MS again.
I've seen this with corridors, alignments and other objects. I've found that opening the properties dialog for the offending object from Toolspace, then closing it always works.