Whenever I host a server with l4d1 campaign, and type this "l4d_csm_l4d1_survivors 2" to switch l4d1 characters only (i.e zoey to francis bla bla), I get this error in the console
Can't set l4d_csm_l4d1_survivors in multiplayer
Need assistance.!!
It shouldn't be needed but try "sm_cvar l4d_csm_l4d1_survivors" (with sm_cvar).