Commit
    NoCommit

    Instructs Oracle RMU to commit the converted database to the
    current version of Oracle Rdb before completing the restore
    operation. Use this qualifier only when the backup file being
    restored is from a previous version of Oracle Rdb. The conversion
    is permanent and the database cannot be returned to the previous
    version. The NoCommit qualifier instructs Oracle RMU not to
    commit the converted database. In this case, you can rollback the
    database to its original version using the RMU Convert command
    with the Rollback qualifier, or you can permanently commit it to
    the current version by issuing the RMU Convert command with the
    Commit qualifier. It is important to either Commit or Rollback
    the conversion after you have verified that the conversion
    was successful otherwise unnecessary space is taken up in the
    database to store the obsolete alternate version of the metadata.
    (RMU will not let you convert to a newer version if the previous
    Convert was never committed, even if it was years ago.)

    The Commit qualifier is the default.