Asking for Operation Arrowhead DVD on Steam.

[Callaghan]

Ok I read the BI forum post on how to get it to work, downloaded the _runA2CO.cmd and ran it in the steam OA directory, added my 505 DVD version arma 2 to steam, ran it after running OA on steam, then ran the cmd again and now it asks for a DVD when I try to run my steam version of OA. What the hell? This is getting incredibly frustrating.

[Dwarden]

i assume You used retail OA update at STEAM version, which was mistake
the retail patch is for 1.50 and 1.51 versions of game
but STEAM has already 1.52 version since game launch!

please revalidate A2:OA game file cache in STEAM