Which version of the game did you purchase? STEAM or RETAIL or MIXED: Steam Are you running an Arma 2 OA beta patch? If so what version?: No Which method are you using to launch the game? I.E Sixupdater/steam/batch file: Steam What is the Error/Problem you're having? Please provide screenshots if possible: I go to run combined op and a little dos window pops up has a flash of words then goes away and doesn't launch the game. I can launch a regular version of the game if needed. Your PC specs: 12 gig ram Intel Core i7 960 @3.20ghz Duel GeForce GTX 285 cards Have you looked at these threads?: Yes http://dayzmod.com/forum/showthread.php?tid=18588