Crashes while exporting

I’ve been using toon boom harmony essentials quite a bit recently. I noticed that when trying to export a video over 1000 frames long, I have to export the video in 2 parts then compile them in another software. If I don’t then the audio doesn’t come through, or toon boom crashes all together. Now today I tried to export a 600 frame video and it won’t work, even if I split the video in two. Are there certain audio files toon boom doesn’t like? Or what is the reason for such difficult exporting?

QuickTime is a 32-bit program and as such is limited to using at most
1.6 GB of system RAM. You can try exporting it in more than two parts
or it may work if you lower the resolution of the output.