I don't have a valid trigger type selected? I did mention in my first post that I've tried the trigger types (both non-zero) specified as being the relevant ones.

I should also add that I get no visible radius on any of the doors. No matter how big or small I set the radius to be, it simply does not appear.

ditto I'm having the very same problem. I've tried both the standard "open door" trigger (10) and the computer console triggering the door to open variation (10 for the console and 11 for the door). I could only find these trigger types by watching a tutorial video for 2.7.1, so the only ...