being able to start the game

[ashien]

when i go to start the mission it tells me "you cannot edit/play this mission because it requires downloadable content that has been deleted.chernarus" help!

[Ray]

You are not running the game as Combined Operations or with wrong parameters, can you be a bit more detailed of what map are you trying to run?

Noticed it says .chernarus, Copy "Addons" folder from ArmA 2 directory to Arma 2 Operation arrowhead directory, should work then.