Thanks for providing feedback, but more specifics are needed if one is to provide a solution. There is no mention for instance of what version you are running of the game (Arma II, Combined Operations, latest version, beta etc), of the addons (several versions were released, final one or earlier) nor of the actual mission file that gives the error message.
That message relates to the RCIR NATO addon
, not the RCIR Special Forces addon. In the associated RCIR mission pack
there are several coops using the RCIR NATO units:
RCIR - Advantage LAW (co06)
RCIR - Blow Guns (co06)
RCIR - Escort Agency (co06)
RCIR - General Strike (co08)
RCIR - Operation Lojack (USAF)
RCIR - Pickup Truck (co05)
When trying to play a scenario from that list one needs the required addon. It is one of the three listed as a requirement.
The following addons are required for these missions:
- RCIR NATO Camo ( http://www.armaholic.com/page.php?id=6513)
- RCIR CDF Special Forces ( http://www.armaholic.com/page.php?id=6660)
- RCIR Minimi Para ( http://www.armaholic.com/page.php?id=7465)