Mapping is always some kind of a riddle.
You make a new map and try to compile it. Sometimes all works fine on the 1st run, but as soon as you try to test your map inside of OA you get an error - like in the case above while loading the map.
Solution is very simple:
http://padworld.myexp.de/forum/viewtopic.php?f=10&t=3302Enter the entity list (press "L") and search for a trigger entity without trianlge.
Select the entity and press "backspace" to delete the entity from the map.
You can also try to run the "brush cleanup" or select the whole map and save the selected map (save seleted...) inside a new file (like mentioned here:
http://www.katsbits.com/tutorials/idtech/q3map2-error-messages.php?subaction=showfull&id=1149147724&archive=&start_from=&ucat=15&), but the above solution worked much better!