Not publishing / previewing

Hello!

I have three courses in Storyline that I'm having some trouble with. Help would be appreciated. 

Issues:

• Whenever I preview a single slide, the preview gets "stuck" as it's generating. 
• Whenever I publish, the process seems to work (all the slides are supposedly generated) but it just brings me back to the Publish dialog box instead of the View Output screen. 
• Whenever I go to modify the player, I get a pop-up dialog box telling me I have low available memory and should close all other applications and save. 

Attempts to Fix

• I have a very powerful machine and I know I don't have low memory.
• I've replicated these same three problems on two other machines, so I know it's specific to the courses, but not the machines. 
• I have tried cutting and pasting, scene by scene, into a new file. I publish after every scene import, trying to weed out the culprit, and it's fine. It's when I publish the entire thing, with a customized player, that it seems to have problems. 
• Out of the blue, the last file started to have problems when I began to import my narration files. That was a new issue. 
• I've recreated the player in a new file and everything works fine for a while, but then something degrades somewhere and the errors begin. I can't isolate whether the player or a slide or an object is the issue. 

Any help would be appreciated!  

Thanks!

 - Michelle