Sorry, I have seen older installed help file not vim73 repository's.
I installed vim73 to my system so that problem was solved. Thanks.

On Jun 6, 9:23 pm, Bram Moolenaar <[email protected]> wrote:
> Tyru wrote:
> > The definition of MAX_MSG_HIST_LEN in feature.h,
> > is 200 in +small or higher version.
>
> > --- quote ---
> > /*
> >  * Message history is fixed at 100 message, 20 for the tiny version.
> >  */
> > #ifdef FEAT_SMALL
> > # define MAX_MSG_HIST_LEN 200
> > #else
> > # define MAX_MSG_HIST_LEN 20
> > #endif
> > --- quote ---
>
> > But above comment and ":help :messages" says MAX_MSG_HIST_LEN is fixed
> > at 100.
>
> I recently changed the 100 to 200 when I could not see what I was
> looking for.  I'll also update the comment, I missed that.
>
> > --- quote ---
> > The number of remembered messages is fixed at 20 for the tiny version
> > and 100
> > for other versions.
> > --- quote ---
>
> > Which is wrong? or I missed something?
>
> That was actually updated.  Perhaps your help files are older than your
> source code?  You need to get the latest help files from the Mercurial
> repository.
>
> --
> If you feel lonely, try schizophrenia.
>
>  /// Bram Moolenaar -- [email protected] --http://www.Moolenaar.net  \\\
> ///        sponsor Vim, vote for features --http://www.Vim.org/sponsor/\\\
> \\\        download, build and distribute --http://www.A-A-P.org       ///
>  \\\            help me help AIDS victims --http://ICCF-Holland.org   ///

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