Topic display no longer works

[David Sumbler]

Help!  I can no longer see my carefully structured topics.

I made some alterations to .gnus, and for some reason the next time I
started Gnus the screen was confused - basically new lines did not
seem to be appearing where required.

After some more fiddling about (not sure quite what I did) I can no
longer display topics at all.  When I press 't' in the Group buffer,
or enable line 3 of .gnus (see below), only a single '[' is displayed,
then I get the message "Wrong type argument: char-or-string-p, nil".

Presumably there is some corrupted lisp code somewhere.  But I haven't
managed to find where Gnus stores information such as the topic
structure.  I tried rebuilding gnus v5.10.6 but it hasn't helped.

My .gnus file (which I'd welcome any comments on) is as follows:

(setq gnus-auto-select-next 'slightly-quietly)
(setq gnus-group-line-format "%M%S%p%P%5y: %(%G%)%l")
;(setq gnus-group-mode-hook '(gnus-topic-mode))
(setq gnus-message-archive-group '((if (message-mail-p) "misc-mail" 
"misc-news")))
(setq gnus-read-active-file 'some)
(setq gnus-select-method '(nntp "usenet.plus.net"))
(setq gnus-secondary-select-methods '((nnfolder "\"\"" (nnfolder-get-new-mail 
t))))
(setq mail-sources '((directory :path "/home/david/Mail_folders/" :suffix 
".prcml")))
(setq gnus-summary-mode-line-format "Gnus: %G [%A] %Z")
(setq gnus-topic-indent-level 4)
(setq server-kill-new-buffers t)

;; For HTML rendering:
(setq mm-text-html-renderer 'w3m)
(setq mm-inline-text-html-with-images t)
(setq mm-inline-text-html-renderer 'mm-inline-text-html-render-with-w3m)

David

--