Explanation: A requested operation encountered a missing or an invalid database host. Or a request was sent to a host that is running a version of the product that does not support the requested operation.
Examine command output, debug logs, and system logs for a more detailed message on the error.
Specify a valid EMM database host on which the following is running: a version of nbemm (the NetBackup Enterprise Media Manager) or an operator request daemon or process that supports the requested operation.