Initializes the SYSGEN work area with system parameter values
    and the name of the site-independent startup command procedure,
    overwriting existing values. The initial values of the SYSGEN
    work area when the utility is invoked are the active values.

    Specify the source for both the parameter values and the
    procedure name. They can be retrieved from a parameter file,
    the current system parameter file on disk, the active system in
    memory, or the default list.

    Format

      USE  file-spec