If you want quick help, people will need more information in order to troubleshoot.
I'd start by giving this information. I mean, you haven't shared what version of CC you're using or what OS you're on or even how much RAM you have to begin with.
Edit: although, I'm guessing your OS is a version of OSX because you used the term "force quit", but whether it's Snow Leopard, Lion, Mavericks, or whatever, we don't know.
I am also getting this error. I'm on AE 220.127.116.11
Its been happening for a week and I've been unable to output a project that needs to go out asap.
I'm on a mid 2010 2x2.4 ghz mac pro
32 gb ram
nvidia gtx 680 2gb ram
rendering to 500 gb ssd
I've tried rendering to QT as well as jpg sequence. Nothing is working.
I've been on the phone with Adobe tech support for over 4hrs this week and still no fix.
I do have element 3d in the comp and have contacted them as well but it uses gpu and not ram.
If you need to get your job out the door quickly, install CC 2014. It will open projects created in AE CC 2015 no problem.
When you get a chance, give us as much info as possible and we can try to help you out: FAQ: What information should I provide?