Closing Outlook archive fails

I have an archive folder currently open in Outlook 2000 that cannot be closed. When I attempt to “Close “Archive Folders””, I get a Microsoft Outlook dialog box warning that “The operation failed. An object could not be found.”

I have run scanpst.exe on the archive, but the problem seems to be from within Outlook rather than in the .pst file. I can open a second folder to a copy of this .pst file and subsequently close that folder with no problem. But the original folder refuses to close.

If I go to properties for this folder, clicking the Advanced button gets the same warning dialog box.

Any suggestions?

Michael