I am currently trying to render a composition from After Effects, but every time I run into the same problem. Rendering starts then suddenly finishes, leaving me with a 68kb .mov file. The composition is rather large, about 5 secs. long and contains alpha. However, I have rendered similar projects without dificulties. Any ideas as to what might be the problem?
What's the duration of your work area?
Try to debug it. Enable the Extra per Frame Info on the render queue and see where it stops exactly. Also twirl open the extended info on the -coRender Queue panel, this might provide additional clues. it tells you exactly on which premp or layer it's chewing currently. This may reveal the baddy.