Shakar (DayZ)

Try having the operation arrowhead launch options be "-mod=Expansion;@dayz -nosplash " without the " ", then launch it as Combined Operations.

It means you need to start OA as Combined Operations usually. I get it when I start the game normally as Operation Arrowhead, but when I start it as Combined Operations, I don't get the error.

I believe they mean something that will lure the zombies away from the player, like pipe bombs do in Left 4 Dead. It would be neat for a LoS kind of thing too like if the player goes by a few obsticles and makes a few turns aorund the buildings the zombie aggro will decrease unless they spot the player again.