Hi Adams Thanks a lot for your quick response. After clean start with emacs -Q, the problem remain. Below is my emacs-version: Emacs 23.3.2 (i686-pc-linux-gnu, GTK+ Version 2.20.1) of 2011-04-06 on wei-laptop On Fri, Oct 28, 2011 at 12:44 AM, Drew Adams wrote: > > (setq file-name "test") > > (describe-variable 'file-name) > > file-name's value is nil > > > > Documentation: > > Not documented as a variable." > > It works for me. Says file-name's value is "test" (and not documented > etc.). > > Give a recipe starting from emacs -Q. > > -- Thanks & Regards Denny Zhang