I have the exact same issue. Nothing changed for me that would of caused this. My game was working fine, I left to eat, came back and error after error the same way. -I have validated my game cache. -Made sure both games were running as administrator. -restarted computer a couple of times. -followed a threat to make sure that my target name for the shortcut "arma 2 beta update" in my arma2 folder said "-@dayz" in there or something like that. -I have updated updated beta patch, even tried 1.62 and still same error. If you find a solution let me know please.