Hi. I've been lurking and trying to fix this problem for a few days now. I tried everything, reinstalling certain parts, copying of the addon folder, i mean anything and everything that I read I tried. The only thing that worked: Deleting everything and reinstalling. 2 things to note about my install: I use the arma 2 free version and the arma 2 operation arrowhead. In my steam/steamapps/common folder I usually have 2 folders for arma: arma 2 free and arma 2 operation arrowhead. I believe the problem occurred when I installed a patch that was for a different setup. It created a third folder, arma 2, i believe, and then when I ran the game I believe it was erroneously trying to pull files from this folder. When I uninstalled I steam deleted files, then I deleted the folders, then I used the windows search and deleted everthing that had to do with arma. I reinstalled using steam, ran the 2 games once to install, then installed using 6 launcher and I was good to go. I hope this helps someone. Good luck!
