Requirements for a grouped backup
Certain requirements must be met for a grouped backup to be performed. If any of the following requirements are not met, a standard backup is performed:
All backup operations must be full backups. Differential backups are not supported.
The master database cannot be included in a grouped backup.
The same policy must be specified for each backup operation in the group.
The same NetBackup server must be specified for each backup operation in the group.