EducationalTestingService / EducationalTestingService/factor_analyzer

Optimization error

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Python
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Descrizione

Hi guys,

I hope you are very well.

I would like to inquire about the ABNORMAL_TERMINATION_IN_LNSRCH optimization error when performing the 5-item confirmatory factor analysis that is explained by one latent variable.

I have found this same issue in other libraries and in R, where they indicate that it can occur in functions where the surface is very flat, in fact if I evaluate these same items by exploratory factor analysis with one component, the factor loadings are very close to each other.

I can do something to avoid this?, What is your opinion of what is happening?, or I would really appreciate if you could tell me how I can justify it, since the study is intended to be a scientific publication.

I leave screenshots with part of the code and the versions I have installed.

Best regards.

Here i define my variables:

![image](https://user-images.githubusercontent.com/122378489/211623510-f31007b6-efd7-4b88-80a1-1d20bd007b38.png)

and then, the problem appears like this:

![image](https://user-images.githubusercontent.com/122378489/211623824-6af4ca04-6579-42b4-b2e3-bbb040dafa64.png)

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