Oracle Error RMAN-06132: cannot backup datafile string because it is not in the control file

Oracle Error Message

RMAN-06132: cannot backup datafile string because it is not in the control file

Reason for the Error

A backup command was issued that includes the specified datafile, but the datafile is not listed in the control file. The control file is not current (it is a backup or a created control file).

Solution

Recover the control file to make it current, then retry the backup command.