Output from "cron" command

Your "cron" job on mercury /root/bin/backup-nightly.sh | mailx -r [email protected] -s "mercury Nightly Backup Cron" [email protected] produced the following output: cannot destroy 'zpool1/mcs-homes27@nightly': dataset is busy cannot create snapshot 'zpool1/mcs-homes27@nightly': dataset already exists