Dave, Thanks very much for your response.
When I open MPC, running on the server, I can play a movie. The files and SQL have wide open permissions.
AVAgent runs in the tray directly on the server. It has the path to the MPC (but there’s never anything in its event log even when I turn on logging).
Have never experienced this problems with previous installations. Been working on this for days and no matter what I try the server response is always the same: it recognizes the request from the iPad for the movie, then immediately says it cannot find the device in AV family. I’ve read AllonisDave’s explanation of “New Zones, Watch, Listen, Cyclestates” several times but I must be doing something fundamentally wrong. If I’m understanding correctly, putting the variable in the chosen zone should direct the play request to AVFamily and find the appropriate driver, device etc. One clue that this might not be working right for me is that I do not get drop down options on the iPad interface. So WHERE? doesn’t list zone options. Watch? lists Movies, Netflix, etc. but I have to choose “Movies”, which I think it should know if it was seeing the zone I’m using (Theater). Have two iPads - - one running myUI.Tablets and one running Modern.Tablets. Don’t get the zone, watch options in either interface.