What should I do when I receive the error message: "Invalid or expired session"

This can occur when a transaction that requires confirmation gets stopped before it has fully completed.  Examples of these kinds of transactions include: submitting a new loan request, processing a pending request, and uploading MARC files.  To prevent the error from occurring in these situations, avoid using the back button in your browser or clicking on hyperlinks while web pages are loading.

This error can also occur when your login session was initiated over a month ago.  To prevent the error from occurring in this situation, do not bookmark pages inside the SILO ILL System.  You should bookmark the web page at the following URL, and login with your Locator code and password each time you use the system:

http://ill.silo.lib.ia.us/