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Anyone successfully used ARIMA model?

When I try this:

model = ARIMA(factors[:, i], (1, 1, 1))  
forecast = model.fit().predict(np.shape(factors)[0] - 1, np.shape(factors)[0], typ='levels')  

All it says is:

Something went wrong. Sorry for the inconvenience. Try using the built-in debugger to analyze your code. If you would like help, send us an email.

There is no error reported. Anyone please?