Hi,
we are successfully running zcs-4.5.5 network edition. Last month i tried for autobackup with crontab. I was edit the file as follow's for target path fix.
# BACKUP BEGIN
0 1 * * 6 /opt/zimbra/bin/zmbackup -f -a all -zip -t /backup/zimbra-backup/ &
0 1 * * 0-5 /opt/zimbra/bin/zmbackup -i -a all -zip -t /backup/zimbra-backup/
0 0 * * * /opt/zimbra/bin/zmbackup -del 1m /backup/zimbra-backup/ &
# BACKUP END

and Daily mail Report give's follow error
Generating report
From 2008-01-10 00:00:00 to 2008-01-11 00:00:00
No messages found

and i got error message from cron daemon as follows
Cron <zimbra@mail> /opt/zimbra/bin/zmbackup -i -a all -zip -t /backup/zimbra-backup/
Error occurred: system failure: Redo log files out of sequence

And I have to upgrade zcs-4.5.5 network edition to zcs-4.5.10 network edition.how to upgrade zimbra zcs.
please any one can solve my doubts ASAP ...

Thanks