I have received the same message with the same information on mine. There
appear to be no missing updates. It could possibly be due to no changes on
the linked files, thus no updates were available. I do agree that it is very
confusing...

"ccac user" wrote:

My workbook contains links to external xls files. When I open my workbook
and update links, I get message that some links cannot be updated. But when
I open "Edit Links", all statuses are showing OK. How do I find which links
cannot be updated?