xym_modding

I'm currently editing my trainings mission with some spawning and admin management stuff and i noticed a new error that pops up when the mission is started. params["_player"]; if (!(isNull (findDisplay 999))) exitWith { closeDisplay 2; }; createDialog "adminMenu"; The code is from my openMenu function and the above mentioned error is thrown at line 3. Can't really tell where the issue lies, i already tried to remove the semicolon at "closeDisplay 2" but the result is the same!