It has come to our attention that there is a problem with checking out Overdrive holds through the catalog.  When you click "Checkout" on the title, you may receive a couple possible error messages:
"An error has occurred: Record Does Not Exist"
OR
"Sorry, we could not checkout this title to you. There are currently no copies available."
(The exact error seems to depend on which page you are accessing your holds from, the Holds page or the View All page.  Neither will produce success.)