Issue facing with adobe after effect cc

[Pushpendra2463943170a6]

As you can see the layer after some 400 to 500 layers the layers are disappereared and not showing in compostion. Please fix me this error I'm making 2d animation and it's my 3 days of hard work i don't want to waste my hard work.

[Rick Gerard · Accepted solution]

You need to split up your comp into shots. There is a display limit, and it's a very bad idea to have one comp that is longer than a few minutes. A 15 minute comp could easily take a couple of days to render and one effect or memory problem can cause it to fail. 

Every shot in a Pixar movie is a separate project; they are rendered and edited into the final movie on a video editing system like Premiere Pro. Follow that professionals workflow. 

You can easily split up your work by moving to the first shot change in your timeline, selecting all layers to that point, and pre-composing. Do it again and again until you have one-shot comps. Start rendering the comps as you go so that you can edit them in Premiere later and efficiently polish the sound tracks, timing, color grading, and everything else that goes into a finished movie.

[Pushpendra2463943170a6]

But before I have mae 20 minutes video in one comp easily. and i made many in one comp. This is the issue I'm facing with this one only. Actually, Pleasae tell me this that the layers serial number is not correct eg- they are 89 10 times. But i want the serial number of all layers correctly.Please help me in this