Hi Rob, > However, with the 'Stop debugging and ...' button I get the "Debugger error: > unexpected response after 'done'" with 0.5511 and "cannot resume dead > coroutine" with 0.6 and 0.606. > I guess your reply on Sunday explains the 0.5511 response. How about the 0.6 > / 0.606 response? Is this normal? No, it's not normal; you should get "unexpected response after 'done'" with 0.5511, "cannot resume dead coroutine" with 0.6 and no error with 0.606. I can't reproduce the issue with 0.606. Can you make sure that the application is really using 0.606? If you do and still have the issue, I'll need a bit more information about your setup. Since this should only happen after "Done" command is sent and only if you have a breakpoint later in the code, can you add "print(require('mobdebug')._VERSION, debug.gethook())" before the line with a breakpoint? That line should print "0.606 nil 0". Paul.