Sorry for the delay getting back to this. I've been meaning to dig further but I keep getting distracted (and then I was on PTO for a week).
I've attached the heat-engine logs from an attempt to delete the stack. I still haven't really tried to track down the problem, but maybe they'll provide a clue to someone else. I'll try to do some more investigation myself and see if I can get more debug information.
Sorry for the delay getting back to this. I've been meaning to dig further but I keep getting distracted (and then I was on PTO for a week).
I've attached the heat-engine logs from an attempt to delete the stack. I still haven't really tried to track down the problem, but maybe they'll provide a clue to someone else. I'll try to do some more investigation myself and see if I can get more debug information.