I'm doing Lynda.com exercises and got to the one called 01_07Intro_3D.eap
says: After Effects error: "Outer Circle/SZ_Circle_Outlines_Ae.ai requires too much memory to rasterize correctly. ( 50::15 )
looked up: Requires too much memory to Rasterise
and tried the 5th frame fix. It did NOT work. And I am running AE 2015 Cloud
Have only 2.93 Ghz Quad Core Intel Xenon with 8GB (maxed) ram with the NVIDIA GeForce GT 512 MB Graphics Card.
Make sure you are running the latest version. If that doesn't help then we need details.
According to the link you provided it seems reverting back to 2014 fixed the issue for that user (who had 16gigs of RAM) so you should try reverting back to 2014
Apart from that...it could also be a problem with that file itself "Outer Circle/SZ_Circle_Outlines_Ae.ai" because it's the exact same file that gave the error to the other guy.