I am getting this error even though i have a MAC PRO 12 core @ 64GB RAM
running: OSX Yosemite version 10.10.3
I have purged All memory and Dick cache
restart and shut down the computer
as well as changed the RAM availability in the preferences option to 61GB of RAM for AE
...after all this i am still able to only pre-render of a couple of hours before getting this message.
what can i do to fix it without closing and re-opening every time.
permanent fixes please no temporary solutions.
I too have had this issue as well as other memory related.
Recently it has got so bad I have had to give up on AE CC2015.
Its not a fix but I reinstalled CC2014 and have been working in that error free since. In my opinion CC2015 should not of been released as it seems a stepping stone to a more complete AE version.
Ive noticed this issue as well with the recent update.