Explanation: The tape manager (bptm) did not communicate with the NetBackup Volume Manager (vmd). This communication is required for most operations.
Recommended Action: On UNIX and Linux, verify that the Media Manager device daemon (ltid) and the NetBackup Volume Manager (vmd) are running. Start them if necessary.
On Windows, verify that both the NetBackup Device Manager service and the NetBackup Volume Manager service are running. Start them if necessary.