To be able to load swank in ccl on MS-Windows-7, ? (list (lisp-implementation-type) (lisp-implementation-version) (machine-type) (machine-version)) ("Clozure Common Lisp" "Version 1.7-r14925M (WindowsX8664)" "x64" NIL) I had to conditionnalize these forms in swank-ccl.lisp: #-windows-target (eval-when (:compile-toplevel :load-toplevel :execute) (require 'xref)) (defun xref-locations (relation name &optional inverse) #-windows-target (delete-duplicates (mapcan #'find-definitions (if inverse (ccl:get-relation relation name :wild :exhaustive t) (ccl:get-relation relation :wild name :exhaustive t))) :test 'equal)) I don't know why xref is not provided, and whether there's a replacement for ccl:get-relation. -- __Pascal Bourguignon__ http://www.informatimago.com/ A bad day in () is better than a good day in {}.