backup.pl script running that time i get some error please help me how to fix the problem

[naveen]

when iam backup.pl script running that time i get some errors

one error
command
#./backup.pl -d /mnt/backup
backup................/mnt/backup/2016-05-17/config.tar.gz....... done
................................................................./application.tar.gz.... tar : ./var/tmp/cachefilestorable/cacheinternalticket: file changed as we read it failed

second error
./backup.pl -d /mnt/backup

/datadir.tar.gz....................tar:removing leading '/' fromm member names

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