Hello,
I've been having an issue where the RAM cache disappears as soon as the RAM playback is stopped. Just to be clear, I'm referring to the green indicator along the top of the timeline so you know which frames are cached. This happens on various computers in our facility. It seems to be more common when multiprocessing is enabled. It also happens if you tell After Effects to RAM preview and then switch to another application. After Effects will complete rendering the RAM preview in the background, the icon will bounce in the dock to let you know it's ready, but nothing is cached when you switch back to After Effects. This is something that I've noticed for a couple of years over multiple versions of After Effects both at home and at the office. It seems to happen fairly consistently with specific comps which makes me wonder if it's related to any of the effects that have been applied in that comp. Any information regarding this behavior would be very much appreciated. Thanks!
Dave Jacobson
After Effects CC 12.0
Mac Pro 5,1
OS X 10.8.4
2 x 2.66 GHz 6-Core Intel Xeon
48GB RAM
GTX 680