problem exporting After Effects Project in Adobe Media Encoder

I have a 19-second composition that only renders the first 1:32 seconds before freezing, then "failing" in Adobe Media Encoder. Pardon my ignorance because I'm not very knowledgeable on the interworkings of how RAM and memory, and all that, but it keeps saying I'm out of memory. I still have 6GB of 8GB of RAM available to use, and my driver is updated to the latest version according to my Mac's latest software update. I've tried exporting on the lowest settings possible while maintaining semi-good quality. Rendering on AE is set to "Mercury Software Only" and on ME it's on "Mercury Playback Engine Software Only". I had never had this problem before until now. Is there something I'm missing here? Something I should be aware of or need to fix?