Chris Kwan

Sure. See below: `/Users/***/opt/anaconda3/lib/python3.8/site-packages/statsmodels/tsa/statespace/sarimax.py:902: RuntimeWarning: Mean of empty slice. params_variance = (residuals[k_params_ma:] ** 2).mean() /Users/***/opt/anaconda3/lib/python3.8/site-packages/numpy/core/_methods.py:189: RuntimeWarning: invalid value encountered in double_scalars ret = ret.dtype.type(ret / rcount) /Users/***/opt/anaconda3/lib/python3.8/site-packages/statsmodels/tsa/statespace/sarimax.py:978: UserWarning: Non-invertible starting...

@ChadFulton Here is the y vector input used in the model. Does this help? ``` import numpy as np import pandas as pd from statsmodels.tsa.statespace.sarimax import SARIMAX import random y...

Which version is the unreleased one that you tested on? @ChadFulton

Is there any updates on this?