MICHAEL You need to back-quote the list and comma-eval the Gray-Array Symbol: CONVERT: (send *dynamic-window* :set-margin-components '((dw:margin-label :string "name" :background-gray tv:10%-gray))) TO: (send *dynamic-window* :set-margin-components `((dw:margin-label :string "name" :background-gray ,tv:10%-gray))) Hope this helps NICHAEL