HELP! My Story File Won't Preview or Publish!

I have recently encountered the problem where Storyline won't preview or publish my file, and I read several threads here on the forum around the same issue. I tried all of the suggested solutions (reinstalling Storyline, reinstalling the Flash player, etc) without any luck. However, I did eventually figure out what was causing the problem, so I thought I'd post it here in case it helps anyone else.

In my case, I had created a player for my course - it wasn't a particularly complicated adaptation of the basic player, but I had several courses that I needed to have the same look and feel so I saved my changes as a custom file. It appears that this file became corrupted, and whenever I tried to preview or publish the course, I got an error message that my computer was low on memory and I should close any unneeded applications (clearly not true, as I have 16GB of RAM on this machine and only another couple of applications open).

I copied all the slides into a new, clean file and deleted the custom player, then rebuilt it and found that everything worked as it should once again. Great relief, as I was up against a deadline and not looking forward to re-creating the entire course!