I am making a 5 room test chamber for portal using the portal 2 authiring tools. everything was working ok but as I was fine tunning things something happened 3 of the rooms have vanished in game. they are there when I edit the map but are unaccesible in game I used noclip to go to the other rooms just to find out they are not there everything associated with those rooms is gone. I get no errors and the other rooms work fine. anyone have any Ideas?