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# generals
Slackbot
10/30/2023, 4:02 PMThis message was deleted.
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Mariana Menchero
10/30/2023, 5:33 PMHi @Naren Castellon what model are you using? the error says the data is non seasonal.
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Naren Castellon
10/30/2023, 5:39 PMI'm using
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Mariana Menchero
10/30/2023, 6:11 PMok, I think that if you have yearly data, the Holt-Winters methods are going to struggle with the seasonality. HW is an extension of Holt's method to capture seasonality https://otexts.com/fpp2/holt-winters.html
Mariana Menchero
10/30/2023, 6:12 PMcan you remove them (HW) and see if that fixes the error?
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Naren Castellon
10/30/2023, 6:26 PMOk, i'll try
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Mariana Menchero
10/30/2023, 6:28 PMok, let's see how it goes. I replicated your code with a subset of the yearly dataset of the M4 competition and also got the "non seasonal data" error.
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Naren Castellon
10/30/2023, 6:32 PMAnd what is the reason for this "non-seasonal data" problem?
Naren Castellon
10/30/2023, 6:32 PMbecause it's strange, the first time I get that error
Naren Castellon
10/30/2023, 6:44 PMWith the MSTL model it sends me another error, when I remove it everything works fine... thank you!!
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Mariana Menchero
10/30/2023, 6:46 PMsure, no problem. For your previous question (why HW doesn't work?), I think it's because the method needs the data to be seasonal. Since it's not, there's probably an issue with the seasonal equation. The link I sent explains the model in more detail.
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