I think what you need to do is turn on the EGC in the are DW::*PRESENTATION-AREA*. We had this problem also, we used the AREAS mode of the PEEK window to track down where we were loosing memory. A form that does turns the EGC on in this area is: (si::make-area :name 'dw::*presentation-area* :gc :ephemeral) Pat Kerpan O'Connor and Assoc. 312-322-7138