Vmware backup failing with Backup Exec 2012

Hi,

I need a help,

Vmware snapshot backups are failing with Backup Exec 2012, its giving error as  ¨there is a changes in the backup policy¨ and error code : v-79-32768-16389

I guide, this is issue with snapshot cache file in datastore, snapshot file is missmatch, can any one let me know the snapshot cache file location to delete manually and try for new snapshot or guide me how to fix this issue.

Thank you