After hours of trouble shooting i have a solution for this problem. step 1 under your Steam library right click on DayZ right click and all the way at the bottom will be Properies. Step 2. Under properties tab all the way to the right is BETA. select version that is at the far bottom. Run Game. Step 3 enter into a server you used to play before error when game loads up it will say you are running incorrect version this is what you want. Quit back to desktop right click DayZ under steam click on properites click on BETA tab select NONE back to regular version RUN GAME. You shoud be all set. Any problems retry all three Steps full restart if not ask here on Forum ill trouble shoot it.