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From: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
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Subject: Re: rebuilding .overview
Date: 12 Feb 1997 09:50:12 +0100
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Michael Lamoureux <lamour@engin.umich.edu> writes:

> 1) the topic buffer reported 105 unread messages in an NNML group.
> 2) upon entering the group, I found only about 20-25 messages.  I read
>    them, and then got out of the group.
> 3) I reentered the group with C-u RET, and could not find messages
>    which I could see in the actual mail directory.
> 4) I looked at the .overview file, and noticed that a large chunk of
>    it had been overwritten with nulls.
> 5) I looked for a function to rebuild it, and then ran M-x
>    generate-nov-databases.
> 6) I reentered the group.  Nothing.
> 7) I got out and reentered with C-u RET again, and found all of the
>    messages that I had never seen, but they all had a "O" mark.
> 8) Then I posted the above message.

nnml had reported that the messages didn't exist, which made Gnus
think that they didn't exist.  So it marked them as read.
Regenerating the .overview file didn't change anything in that regard
-- Gnus continued to have them marked as read.

-- 
(domestic pets only, the antidote for overdose, milk.)
  larsi@ifi.uio.no * Lars Ingebrigtsen