I get a bizarre error. Why does mapconcat care whether buffer-file-truename is a sequence? As long as ("/p" buffer-file-truename) is a sequence (and it is) everything should be fine. Signaling: (wrong-type-argument sequencep buffer-file-truename) mapconcat(identity ("/p" buffer-file-truename) " ") print-region-1(1 8974 ("/p" buffer-file-truename) nil) #<compiled-function nil "...(7)" [print-region-1 lpr-switches nil] 5 ("c:\\Program Files\\Xemacs\\xemacs-packages\\lisp\\os-utils\\lpr.elc" . 3722) nil>() call-interactively(lpr-buffer) command-execute(lpr-buffer t) execute-extended-command(nil) call-interactively(execute-extended-command) ----- Original Message ----- From: Andy Piper <andy(a)xemacs.org&gt; To: <xemacs-nt(a)xemacs.org&gt; Cc: <xemacs-beta(a)xemacs.org&gt; Sent: Wednesday, December 08, 1999 12:09 PM Subject: lpr.el sync printer ------------------------------------------------------------------------ --------