shell script hook

[cheng mike]

Hi All,
I add a shell script hook to auto update the central repository in hgrc. It
report below error message but the central repo is updated. Does anyone know
the reason? The mercurial is 0.93 and the OS is opensolaris.

hgrc:
[hooks]
changegroup = hg update

$ hg push
pushing to http://ns-x4200-15.sfbay/hg/mytag/
searching for changes
abort: HTTP Error 500: Internal Server Error


$more error_log
[Wed Jul 11 02:36:25 2007] [error] [client 192.168.16.190] malformed header
from script. Bad header=1 files updated, 0 files merge: hgwebdir.cgi

thanks
Mike
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