Linked files not updating-can't find problem
 

I have multiple files linked to two other files. I have been using these
files for years in this manner, and have never encountered this problem.

When I open the file, it asks if I want to update. I click update, and I
get the error message "This workbook contains one or more links that cannot
be updated." I click Edit Links, only to find that the path and file names
are correct.

I have already tried changing the source to see if this will help, but it
doesn't. What suggestions does anyone have? Thanks!
--
Audrey G.