Re: After Effects keeps crashing on 9000 frames! Urgent!

Does it only crash during export or while scrubbing through to 9000 frames as well? Are you using "export" and "render" interchangeably here, because they are 2 different things...you can search the forums for an explanation - though I can't recall the particulars I believe Dave LaRonde has posted in the past on the differences between the two.

I would try accessing the secret area of your preferences and purging every X frames (where X is a number of your choice). To do so, hold down shift and navigate to the "preferences" folder from your menu - if you've done it right, the last option in the preferences dropdown should be "secret".

From here you can tell AE to purge every X frames during a render. This has helped me overcome crashes in the past. The downside is that your render time will increase if you are using time-based effects as they use previous frames to calculate how they'll be applied to the frames ahead.

Hope this helps