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I have the same Problem on Steam... but with Lingor Island... --------------------------------------------------------------- Data file too short 'c:\program files (x86)\steam\steamapps\common\arma 2 operation arrowhead\@dayz_lingor\addons\dayz_weapons.pbo'.Expected 37427396 B, got 8322813 B

Hello everyone, I have the Problem (Bad serial number...) when I would start DayZ on Six Launcher;DayZ-Updater;DayZ Commander or with the installed Beta Patch ("Launch Arma 2 OA Beta Patch (I normally use this)) and I dont know what to do... (before I had this Error, I had another ingame-Error called "Connecting failed) to fix this Error I should go in Steam to Arma 2 Operation Arrowhead (right klick on it) to properties than local data than check gamedata for errors after that, Steam has downloaded a new data file because one of the old files was damaged or something (idea from Google)... but after fixing this error, I get the Error "Bad Serial number given in setup" if I start DayZ from any of the Launchers... (Before I got this Error, I could play DayZ normal) any ideas?

I have this Problem too and I have tryed to restart Steam and run as admin... but it dont works... I have tryed to start DayZ with DayZ-Updater;DayZ Commander;Six Launcher and with the installed Beta Pach "Launch Arma 2 OA Beta Pach" but the same problem (before I get this Problem, I had another Error ingame "Connecting Failed"... to fix this Error, I should go in Steam to Arma 2 Operation Arrowhead (right klick on it) to properties than local data than check gamedata for errors after that, Steam has downloaded a new data file because one of the old files was damaged or something (idea from Google)... but after fixing this error, I get the Error "Bad Serial number given in setup" if I start DayZ from any of the Launchers...