problems in sending out emails

[Sharon Kimble <boudiccas@skimble.plus.com>]

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I am having problems in sending emails, which when I try I get this
showing in the message buffer -

--8<---------------cut here---------------start------------->8---
Save entry? (y or n) n
Desktop saved in ~/.emacs.d/desktop/
Mark set [2 times]
Can't find article 1062
apply: Wrong type argument: arrayp, nil
Expiring articles...done
No more unseen articles
No more unread articles
Mark set [2 times]
Can't find article 1062
apply: Wrong type argument: arrayp, nil
Mark set [2 times]
Can't find article 1062
apply: Wrong type argument: arrayp, nil
Expiring articles...done
Desktop saved in ~/.emacs.d/desktop/ [3 times]
--8<---------------cut here---------------end--------------->8---

The thing that stops me sending emails seems to be the line -

╭────
│apply: Wrong type argument: arrayp, nil
╰────

The only way out that I can find is to close gnus, close emacs,
and then restart, which is not ideal. This then works for a while,
before the exact same problem reoccurs, with only the message
number changing. 

How can I break the cycle and keep sending mails as required please?

Thanks
Sharon.
-- 
A taste of linux = http://www.sharons.org.uk
my git repo = https://bitbucket.org/boudiccas/dots
TGmeds = http://www.tgmeds.org.uk
Debian testing, fluxbox 1.3.6, emacs 24.4.1.0

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