VMS Help DECTPU, TPU$CONTROL, Argument  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 integer

    OpenVMS usage:integer
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Prevents DECTPU from displaying the message "Editing session is
    not being journaled" when the calling program gives control to
    DECTPU. Specify a true (odd) integer to preserve compatibility in
    future releases. If you omit the parameter, DECTPU displays the
    message if journaling is not enabled.