_pos should be _charPos. Currently it causes this error in server RPT on 1.63.112555+ because it references the player object, not the player object's position:
6:36:48 Error in expression <ear"] call server_updateObject;
} count nearestObjects [_pos, dayz_updateObjects>
6:36:48 Error position: <nearestObjects [_pos, dayz_updateObjects>
6:36:48 Error 0 elements provided, 3 expected
6:36:48 File z\addons\dayz_server\compile\server_playerSync.sqf, line 209