Kai Grossjohann <grossjohann@amaunet.informatik.uni-dortmund.de> writes:

> What does C-h c | tell you when typed in a Gnus summary buffer?  For me,
> it says it runs the command gnus-summary-pipe-output.  If it is different
> for you, that might be a problem.

It is defined as gnus-summary-pipe-output.

> Just for fun, could you `emacs -q -no-site-file' then start Gnus then see
> whether `|' works.  The `-q' means don't load ~/.emacs, the
> `-no-site-file' means don't load site-start.el.  Omitting one of the two
> arguments loads the respective file, this way you can narrow down where
> the problem might be.

I spent some time with this.  By temporarily renaming my startup files one
by one I've narrowed it down a little more.  My .emacs seems to be OK.  If
I rename .gnus AND .xemacs-options I'm OK.  If I load either .gnus OR
.xemacs-options, I get 'Wrong type argument: stringp, nil'.  The backtraces
in either case appear to be identical except for the tmp buffer name.

I've been through both files and I don't see anything obviously wrong.  But
then, I don't really know what I'm looking for.

Backtrace with .gnus loaded follows.  I hope that's OK.

Signaling: (wrong-type-argument stringp nil)
call-process-internal("/bin/bash" "/tmp/emacsa29486" #<buffer "*Shell
Command Output*"> nil "-c" nil) apply(call-process-internal "/bin/bash"
"/tmp/emacsa29486" #<buffer "*Shell Command Output*"> nil ("-c" nil))
call-process("/bin/bash" "/tmp/emacsa29486" #<buffer "*Shell Command
Output*"> nil "-c" nil) apply(call-process "/bin/bash" "/tmp/emacsa29486"
#<buffer "*Shell Command Output*"> nil ("-c" nil)) call-process-region(1
3244 "/bin/bash" nil #<buffer "*Shell Command Output*"> nil "-c" nil)
shell-command-on-region(1 3244 nil nil) gnus-summary-save-in-pipe(default)
byte-code("¬„ÁÂ!‡qˆ¬ƒÇª‹Èa«ƒÉª‚\nÌa­‚
qˆ!+‡"
[gnus-default-article-saver error "No default saver is defined"
gnus-article-buffer save-buffer gnus-save-article-buffer
gnus-prompt-before-saving default always nil file filename t num
gnus-number-of-articles-to-be-saved gnus-article-current-summary] 2)
gnus-article-save(#<buffer " *Gnus Save*"> nil 1)
gnus-summary-save-article(nil t) gnus-summary-pipe-output(nil)
call-interactively(gnus-summary-pipe-output)


--

Bud Rogers <budr@sirinet.net> http://www.sirinet.net/~budr/zamm.html
formerly <budr@tanet.net>