ITERATE

        FIT\ITERATE [N]

    ITERATE  tries the GRADIENT technique to improve the last results of the
    profile fit. Optional argument N indicates the number of iterations.  Do
    not  expect  spectacular  results  if the absolute minimum is far away !
    Typically, this command should be used if the previous fit did not  con-
    verge,  but  seems  close enough.  If you are using the GAUSS method, be
    cautious not to change the X unit in the mean time.