Each time that I bring up FS9 I get a warning- " PMDG737.dll- potentially incompatible AC or Software" '"Do you wish to load this module or not" Should I delete this from the modules section or not, if I say yes or no to the question it seems to make no difference to the AC it is rather a nuisance. Any advice welcomed. John. Cypilotx(

John,That's not a normal message. I'd try reinstalling the 737. (you'll have to reinstall the 744 too if you have that or at least backup or rename PMDGOptions.dll, otherwise it gets overwritten with the older 737 version.)