I'm fairly new with After Effects and my problem is that when I am trying to render my movie, it fails to render at the exact same point every time. The point where it fails is when my 1st video is transitioning to my 2nd video in the movie. And when I try to RAM preview my movie, it wont render parts where one video transitions to another video. Earlier today there was an error coming up saying that frames could not render simultaneously and that I needed to fix my multiprocessing settings. I'm using both Quicktime Movie and MP4 files in this movie. Here are my Memory and Multiprocessing settings: http://gyazo.com/4974772d0a104f01c19257d75b790155
You need to understand that 6 gigs is not enough to run AE efficiently. You need to get more RAM. For the time being, you should turn off multiprocessing (render multiple frames simultaneously) render with just one processor.
Write back to tell us how things turn out.
Well, if it always happens at the same point, then eitehr consistently and predictably something is filling up - memory, disk drive, whatever - or the footage isdamaged at that exact spot. and yeah, on your system there is no relaistic way to use MP, so just leave it off...