Hi Hans, While investigating the effect of subclassing ACCEPTOR-STATUS-MESSAGE, I came across this behaviour: CL-USER> (load "srv.lisp") The value 404 is not of type SEQUENCE. [Condition of type TYPE-ERROR] --8<---------------cut here---------------start------------->8--- ;;; srv.lisp (in-package "CL-USER") (asdf:load-system :hunchentoot) (asdf:load-system :drakma) (setq tbnl:*catch-errors-p* nil) (tbnl:start (make-instance 'tbnl:acceptor :document-root nil :error-template-directory nil :address "127.0.0.1" :port 50000)) (write (drakma:http-request "http://127.0.0.1:50000")) --8<---------------cut here---------------end--------------->8--- I've set TBNL:*CATCH-ERRORS-P* to NIL so that you drop into the debugger. This shows that the call (START-OUTPUT 404 ...) results in a (LENGTH 404) call, which is what fails, but it's not obvious (at least not to me) where this LENGTH call is coming from. Sebastian -- Emacs' AlsaPlayer - Music Without Jolts Lightweight, full-featured and mindful of your idyllic happiness. http://home.gna.org/eap