EndNote Error: An attempt was made to access an unnamed file past its end

Please try to insert citations in a new, blank Word document.

If the same error does NOT occur in the new, blank Word document, please perform the steps in this support article : EndNote: problematic field codes causing jumping cursor, "the range cannot be deleted" or other problems while formatting.

If the issue persists on a new, blank Word document, please try the steps below:

1. Open Windows File Explorer (Ctrl+E) and navigate to the EndNote program folder (typically C:\Program Files (x86)\EndNote 20).
2. Double-click/run the "Configure EndNote.exe" file inside the EndNote program folder.
3. Make sure "Configure EndNote components" is selected and click Next.
4. Uncheck (If the box is ticked) “Cite While You Write add-in for Microsoft Office” and click Next > Finish.
5. Next, repeat steps 2~4 but make sure to check the “Cite While You Write add-in for Microsoft Office” box this time.
6. Open Microsoft Word and look for the EndNote 20 toolbar in the ribbon. Try to insert some references into a blank new document.

If this does not work, you can also try to repair the EndNote program.

1. On your Windows search > Look for Add or Remove Programs
2. In the list of installed applications, click on EndNote 20 > Modify > Repair > Complete the process.

Please note that you will need administrative privileges on your PC to perform the above steps.