There is no specific code line. The error occurs anytime the file is accessed. For instance the table is in the DE of a form, when the form opens the error occurs. The file is used in many separate instances of my project. It is unavailable to anyone.

I tried renaming the file because that simulates the problem. If I could rename the file then I could open it without an error. You can copy a busy file, but you can not rename it or move it or delete it.