I recently rebuilt my flightsim box, reinstalled and updated all of my pmdg software including the 744. I'm back up and flying the 737 but every time i try to load the 744 fs9 crashes. I checked the event log and got the standard (i don't know what happened) error message from windows. Any help would be appreciated!Alex

Alex,Did you install the 737 after the 747? That'll do it if so...Otherwise, I'd clear out everything in your My DocumentsFlight Simulator Files folder and delete your fs9.cfg and fsuipc.ini and allow FS to rebuild them. That's usually fixed weird issues like this for me.

The 744 was the last aircraft to be reinstalled.I'll clean out my docs and delete the fs9 config and see what happensThanks for the helpAlex