After effects not rendering full composition, Says "Failed"

Standard troubleshooting steps for fixing a failed render:

1. Check the error log
2. If the failure was caused by a lack or resources then open up the Secret panel in the preferences by holding down the shift key when you open preferences>general and set AE to purge every frame.
3. If your comp has several shots in it that you are trying to edit into a movie try splitting the comp up into single shots and render each shot separately
4. If #2 was not the problem and #3 does not apply then dheck the comp by moving the CTI to the frame where the render failed, pressing the U key twice to reveal all modified properties of all layers in the comp and look for any changes, keyframes, new effects of other new things that happen in the timeline near the point of failure.
5. Set the work area to a few frames before the failure and extend it about a second beyond the point of failure and try rendering just that section.
6. If the test render fails start turning off effects one at a time for the layers picking the likely suspects first. The layer causing the problem should show up fairly quickly.
7. If the test render does not fail you can pick up the render from the part that failed and stitch the two pieces together in PPro or even in AE and render a complete movie.
8. If you still have troubles try rendering an image sequence. You'll have to add the image sequence to a new comp or to your NLE and then add the audio track, but image sequences let you fix even a single bad frame and rendering movies, especially re-rendering a long comp that is constantly failing is a complete waste of time.

I hope this helps you find the problem. Your limited description of your workflow and the comp gives us very little to go on except that Form and Particular can quickly eat up all your system resources.