I have run the Verify Data tool, which initially found an error. I then made a safety backup of my company file, and ran the Rebuild Data tool.
After that, I reopened the company file, and ran Verify Data again, which reported no errors.
I then clicked on Invoices in the ribbon, which did the exact same thing again: opened the Invoices in a tab, and 14 empty, untitled tabs after it.
