An incremental backup for virtual machine 'virtual machine name' is not possible because changed block information cannot be obtained. A full VM backup is attempted instead.
Changed block information is required to perform an incremental backup, but the information could not be obtained from the virtual machine. The information can be missing if two nodes back up the same virtual machine. One node runs a daily incremental backup, and the other node runs a weekly full backup. After the weekly full backup runs, the next daily backup cannot obtain changed block information, so a full backup is run instead of an incremental backup. Subsequent daily backups will be incremental until the next weekly full backup.
The backup continues as a full backup instead of an incremental backup.
Search the IBM® Tivoli® Storage Manager support site http://www.ibm.com/support/entry/portal/Overview/Software/Tivoli/Tivoli_Storage_Manager for this message number, for other possible causes of this error.