When in the Work order inquiry WO-Q, when I pick archived work orders, and enter the number directly into the WO prefix/suffix fields, I get the following message, "Work Order Number already exists in the Archive WO files; please enter a different WO number."  And then "Valid check for this field returned false, please reenter."
If I just do a lookup and highlight the same work order number I entered to get the error messages, click enter, the work order is displayed properly.