where is the mistake

[Andreas Altenburg]

this is my boot script:

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ulimit -v 2048
csh -cf '/var/qmail/rc &'
supervise /var/lock/qmail-smtpd
tcpserver -v -x/etc/tcp.smtp.cdb -u$USERID -g$GROUPID 0 25 \
rblsmtpd qmail-smtpd 2>&1 | stuidgid qmaill accustamp | \
setuidgid qmaill cyclog -s5000000 -n5 /var/log/qmail/qmail-smtpd &
echo "."
;;

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an error occurs with the command "setuidgid qmaill cyclog ...."
cyclog cannot be found.

what is the meaning of this line? how can I replace it??