Having removed the door next to my stuck door, was able to reach 2 screws holding catch plate to cut them off with hammer and chissel.
Finally was able to post pic of inside of latch. Screw holding trip arm had backed out so this door was never going to open. I called Thor and the tech said they had never heard of this happening. It would be an easy fix if this happens to just crawl through from the other side and remove the latch plate from the inside. But when this happens to a door where you can't crawl though, or on you generator door, or even on the convenience door, big issue.
Going thru every latch today and making sure this screw is adjusted properly plus greasing interior moving parts. This may go on my annual maintenance list. Certainly do not want it happening again while on the road.