bad serial number given in Setup

[Raphael_Lafayette 1]

I'm having trouble starting the game, the error message appears ''bad serial number given in Setup'' what can I do? Sorry for the english haha

[Selvetarm 0]

you have to start arma 2, arma 2 OA and then arma 2 CO before launching dayz

[IIxSubmarinex 13]

Try what Selvetarm suggested, if that fails, verify the cache by right clicking arma II: OA Properties Local Files *Verify Integrity Of Game Cache*, the completely * i say* "Completly exit" steam, the open again as admin, test it, if that fails verify it again and try it, :)

if that fails to work as well, go take a peep at this post "http://dayzmod.com/forum/index.php?/topic/68081-fix-arma-2-combined-operations-says-bad-serial-number-given-in-setup/"

-IIxSubmarinex