Oracle Message ORA-00296 - maximum number of files (string) exceeded for RECOVER DATAFILE LIST

ERRORmaximum number of files (string) exceeded for RECOVER DATAFILE LIST
CAUSEThe RECOVER DATAFILE LIST command specified more datafiles than are allowed by the DB_FILES initialization parameter. This error occurs when doing recovery with Recovery Manager, and the instance has been started with a DB_FILES parameter specifying fewer datafiles than recovery manager needs to recover to satisfy the users RECOVER command.
ACTIONRe-start the instance with a higher value for DB_FILES.