how to check if pdf attachment of references are available?

many references in my endnote library have its pdf attachment,but some pdf file was deleted from storage location.

i want to check which references  lost the link to its pdf attachment. who can tell me a easy method to do it?

Technical Support has some internal tools that can be used to determine which links in the library are broken. You can contact Technical Support here to send your library database:

Jason Berman
Technical Sup Rep RS

Thomson Reuters

Phone: +1 800-336-4474