Disk Overload during Export of Small Project

I keep getting a disk overload error when I am trying to export a small project- 10 midi tracks. I do not believe it is my computer, as I have a template with hundreds of tracks, and I just exported a ridiculous synth project not five minutes ago. The midi in this case is just halion sonic, as I am too lazy to even load any other instruments, so I do not know what is going on…

It seems to be overloading right at the end of the file, where there is silence. I tried it with both realtime on and off.

It appears to be the arranger track. When I flatten it, everything works fine.