My configuration is: Emacs 21.3.1 and CMU CL 18e under Linux. swank:arglist-string always returns NIL for generic functions. I have investigated the problem and here is a tiny patch: --- swank-cmucl.lisp.~1.50.~ 2004-01-16 00:54:45.000000000 +0600 +++ swank-cmucl.lisp 2004-01-17 04:18:09.000000000 +0600 @@ -781,7 +781,7 @@ (cond ((eval:interpreted-function-p fun) (eval:interpreted-function-arglist fun)) ((pcl::generic-function-p fun) - (pcl::gf-pretty-arglist fun)) + (pcl::generic-function-pretty-arglist fun)) (arglist arglist) ;; this should work both for ;; compiled-debug-function and for It seems pcl::gf-pretty-arglist always returns nil :( If you want to apply the patch and to mention my name in ChangeLog, use unmodified e-mail (with +nospam@). Or do not mention e-mail at all. -- Ivan Boldyrev Onions have layers. Unix has layers too.