Library issues

We currently using a shared library, have added another user, and getting the issue, 'Could not place the document because the file could not be found', when trying to pull in a library item.  The user is locked down to read only as are other users and no other problems with anyone else (about 10 people sharing the library).  Have got the user to sign out and sign back in and have even removed the user and re-added them to the library repository.  I'm hoping its something simple, can anyone help?