Wait
    Nowait

    Specify the Wait qualifier to cause Oracle RMU to close and
    recover the database before the system prompt is returned to
    you.

    The default is the Nowait qualifier. With the Nowait qualifier,
    the database might not be closed when the system prompt is
    returned to you. You can receive errors when you attempt to
    access a database after you issued the RMU Close command and
    the system prompt is returned, but before the monitor has closed
    the database.

    See the Usage Notes for restrictions on using the Wait qualifier.