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Optimization error

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Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
20/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
python

Research direction

Start by reproducing the five-item confirmatory factor analysis described in the issue, using the code and installed versions shown in the screenshots. Inspect the ABNORMAL_TERMINATION_IN_LNSRCH output and determine whether the issue identifies a reproducible library problem or only a model-specific optimization failure; a useful resolution would document the cause and a justified way to handle it.

Written by the indexing model from the issue text.

Description

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

and then, the problem appears like this:

image

Dominant language
Python
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