See one more guess at your other post.

stan sitek wrote:

When using the delete links add-in, six out of seven links
found were successfully deleted. The remaining link
returned the following error msg:

Routine location error code: 6. Some defined name links
may not be deleted.

The deleted links reference sheet listed an internal link
location of NA for this link. This link still appears
when attempting to edit links. Any idea how to find and
subsequently delete this invalid link?

--

Dave Peterson