Roto Brush 2 doesn't work

[Dima0D4D]

I tried to separate the object from the background using Roto Brush 2. Several times after about 300 frames, a black screen appears and the rotoscoping stops. What to do?

[Rick Gerard]

You are probably running out of system resources. Try clearing the cache before you start. Try setting the available memory for other apps to an even number. Make sure Adobe apps have an even number of GB (4, 8) allocated. Make sure that you are only using rotobrush on the frames that are going to end up in the final comp. Your layer is about 15 seconds long and that's an eternity in most AE Comps.