Hello. I would like to use the MOP to set-up connection to a database by allowing a value of :persistent to the :ALLOCATION option which only takes (:instance and :class , I guess). As I read the MOP book (pg. 99-106) it would seems that I could, but using Lucid 4.0.2 I can't see how to do it, since the defclass macro complains. Any help appreciated. Scott Staley (staley@carnap.srl.ford.com)