We're getting lots of error reports regarding the Easy Rawlins series, as the older files have been pulled by NLS. We're working on updates that will keep withdrawn files from causing errors at duplication, but until then, please make sure that this series (and the other titles reported as Withdrawn here on the forums) have a Reissued link to the new version where available, and that the old version has a Title Status of Withdrawn.
You may also want to run the Patrons with Queued Title report to find patrons with any of these titles in their Service Queue or a pending Dup Order, so you can pull it before it causes problems for your duplication staff.
I recommend deleting the series and subject at least from the withdrawn titles. That way your title count in Headings Maintenance is more accurate. Deleting the author also makes the Headings count more accurate but it is a way to find the deleted title.
I have seen Nightly look at withdrawn titles in it's subject searches before looking to see if the book is available. So removing the subjects can also prevent nightly from wasting time.