Help debugging

Anyone have any clue what this is? Value: "21.1 (patch 12) \"Channel Islands\" XEmacs Lucid" Signaling: (void-function null-buffer-file-name) signal(void-function (null-buffer-file-name)) byte-code("..." [kill-buffer buf signal data] 3) find-file-noselect("/home/nbecker/balmail.tar.gz") find-file("/home/nbecker/balmail.tar.gz") #<compiled-function nil "...(8)" [t find-file-run-dired find-file dired-get-filename] 2 ("/usr/local/lib/xemacs/xemacs-packages/lisp/dired/dired.elc" . 61862) nil>() call-interactively(dired-advertised-find-file)