If you're using Windows Vista, the operating system is only capable of using up to 3 GB of memory even if it has more. Besides, if you have programs running in the background, that might be you're problem too.
Its possible crashing because its running out of memory. I find for larger maps that going to "Tools> Options> 3D View> Performance" usally helps alot.
Also, I made some ceiling destruction in a map and put some lights shining down into the room. I compiled and it looked fine. Then I added a lot of props in the ceiling and recreated the lights a little differently, and now the map appears pitch black.
Try compiling without RAD. If it's still dark, I don't know what to do. If not, you may have 'disable shadows' off. Enable that and see what happens.
Damn. Maybe try adding a dim light in the center for some ambience.
Thanks, but I don't particularly like doing that because it tends to look strange, and also the room was looking just fine before I changed the lights.
Or just use a "Light" and set the constant to 100002, and the color to [Number] [Number] [Number] 5.
So you doesnt have this "strange" look, and your black areas are dimmed.
Did you disable shadows on all of your squarebeams and other things? If not, do that.
[Changing the subject]: I'm with a problem with some instructor_hints that i placed on my map for obvious reasons... now i have 6 of them that are activated along the map in different places, but suddenly they just stop working, i checked the I/O, the target entities to follow, but all appears to be ok.. i don't know what to do.. is there any limit number of them that i can put on a single map?