I was able to get tech support on the phone, who walked me through opening the file in repair mode. Although it didn't immediately work (was getting the same error,) after a couple of tries it seemed to all be fixed. I'm not sure if the repair solved it, as there were no errors found, or if it was just some weird fluke glitch.
Hopefully it doesn't happen again, or to anyone else, but if it does I guess the place to start troubleshooting is to open in repair mode.
I have the same issue. Getting the same error message. I run it through repair mode a few times, but the same schedule keeps coming up with the same error
Thank you for sharing your experience and I am very sorry about the issue!
There could be multiple reasons that could lead to this error. To find out the exact culprit, I would like to kindly ask for the file for a closer look. Please let me know if you need a secure place to upload it also!
Looking forward to hearing from you!