To find broken file attachments in the currently open library, go to the Tools menu and select the Find Broken Attachments Links command.
EndNote finds all references with broken file attachments and displays them in the Library window. In the Groups panel, EndNote creates a new group called Broken Attachments.
Broken file attachment links occur when EndNote cannot locate the file in the path specified in the File Attachment field. In these instances, EndNote cannot display or index the attached file or include the file when compressing a library.
This situation may occur when you:
Open a library that has one or more broken file and figure links.
Import a library that has one or more broken file and figure links.
When you transfer PDFs and figure files using the Sync function and EndNote finds one or more broken file and figure links.