I did have the DayZ Mod when all this started, It's really the only reason I have Arma. I can Launch Arma 2 perfectly, but Arma 2 OA just wont work (I literally can't even launch it) which then also leads to me not being able to play the DayZ Mod. I previously used DayZ Commander, but stopped as soon as this error showed as I had read on the internet that it can cause this, which I now know, is not true. I have tried installing the latest BETA patch for Arma 2 OA and the Obsolete Arma 2 Beta, as I have read it adds some files or whatnot, I have also Re-installed both Arma 2 and OA about 3 times, but no different in the end. Does anyone else not have this problem?