action
    OpenVMS usage:value
    type:         longword (unsigned)
    access:       read only
    mechanism:    by value
    This argument can take two values:
    If Value of
    Action Is...       Then...
    LGI$_DISUSER_STOP  Do not return on error.
    LGI$_DISUSER_      Return LGI$_DISUSER or SS$_NORMAL.
    RETURN