Showfile Loading error

So here is a strange one. I have a showfile (3.15.1) that  loads into Hog 4 PC and onto a console from a backup file just fine, but when I log off and try to log back into the show I get an error that pops up that says Unable to retrieve object for ID 879 (sometimes this number changes) from parameters Array. The only way I can get my show to load is hard rebooting the console and loading the show from a backup. This seems to have all started after I removed some plot images and added a few new ones. I've tried started a new show and Merging all my data in and had the same result.

Thanks,