Message says: "The file specified cannot be opened.  Make sure that it is not currently being used by another program or is a read-only file". "The Windows error is 'The file exists'. OK"

Clicked OK 30 times; message keeps reappearing.

Must go to Task Manager to exit QuickBooks.

Ran latest version of File Doctor; no help.

Have two other company files; they work fine.

QB Desktop Pro 2018 Release R9P

Windows 10