When using

AutoARIMA

, I get a lot of warnings like

UserWarning: Having 3 or more differencing operations is not recommended. Please consider reducing the total number of differences.

and

RuntimeWarning: divide by zero encountered in long_scalars fit["aicc"] = fit["aic"] + 2 * npar * (npar + 1) / (nstar - npar - 1)

. Shouldn't these warnings be suppressed by using the automated version of the ARIMA?