I just tried switching the comp resolution from Full to Half and it seems to be exporting fine now.
Does this mean that I just don't have enough RAM?
But even when it would stop, trying to pick it up just from the point the error occurred at didn't work. If the prior frames were already exported, then they shouldn't be occupying the image cache anymore, should they?
If you are running into memory issues when rendering a high res movie, you could try telling AE to purge every few frames during Make Movie. This helpful option is hidden in AE's "Secrect" preferences menu. To access this, hold down the shift key while you open the preferences window. You should then see an option for the "Secret" preferences on the left. Tell it to purge every few frames or so. Be careful with the other settings in this menu as some are dangerous. This will take longer to render, because its purging from memory regularly, but can get you over a bottleneck heavy frame in a high-res comp.
Yep, turned off multiprocessing and tried again...nothing. And I've never had OpenGL enabled, advice taken from a good friend of mine who told me to just disable it and never look back to save myself a series of headaches.
Now, I've only been told recently that I should be exporting image sequences instead of using the render queue or exporting to movie straight out of AE, but I haven't been having much luck with it.
AE makes the image sequence fine enough, but Compressor can't seem to use the animation or PNG codec to make a lossless video file to pass back to the client, which they then import into their NLE of choice. Made a ProRes .mov just fine, and that may have to do, but am I missing something?