Try This for Presenter Hanging on Temp File Cleanup

Over the past couple weeks in re-publishing 14 older courses originally done in Studio 13, and allowing Studio 360 to do in-place upgrade of course content and quizzes, I ran into many fails at "Cleaning Up Temporary Files" final step in publishing. Error message popup stating that a xxx.json file could not be accessed due to being open in another process. It is always a file with a number (ex 431.json) in the output mobile folder. I don't know what it is or why it fails there. 

There are other posts that identified Smart Art not converted to pictures. I found through a couple weeks of trial an error some things that I did and got successful publish. Your mileage may vary, but if you are stuck, might as well try. 

• Animated GIF...I had some that were made inop at conversion (1st frame only shows) and when removed, the course published.
• Graphics that were in text boxes. on deleting a graphic, an empty text box left over. Replace with a screen shot jpg of the image and it published. In some cases there were up to around 10 empty transparent text boxes on top of each other to remove. 
• Strip out all speaker notes using document inspector (file, info, inspect)
• Powerpoint tables- in some cases replace the table with a screen shot worked. 
• In one case uninstall and reinstall studio and A360, and in-between cleaning all remaining temp and cache. Support has a batch file 

Good luck. Annoying but beatable.