I have a multiplicative ARMA model that seems difficult to estimate as is actually not converging. I know that usually it means that the specification of the model is not good, but I think in this case if I augment the limit of iterations it will soon converge. Is there a way of doing that? and, Is there a way of changing the tolerance criterium for ARMA models? -- Ignacio Díaz-Emparanza Dpto. de Economía Aplicada III (Econometría y Estadística) UPV-EHU