Oracle® Database 11g / 12c / 18c error codes ORA-01254: cannot end online backup - file [string] in recovery manager backup

ORA-01254: cannot end online backup - file [string] in recovery manager backup

Oracle Error Code: ORA-01254

Cause: The specified file is being backed up by Recovery Manager.

Action: Wait for the Recovery Manager proxy backup to complete. Recovery Manager backup mode cannot be initiated or terminated manually.