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Not positive definite error message |
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I am running a measurement model with six latent variables, two of which are second order factors. I have been receiving "PSI matrix not positive definite" error. I have checked residual variances, none is negative. The latent variable correlations are not over one. I checked the data file, the is no problem with reading the data file. What may be other reasons, and how can I solve this problem? Thanks, Metin Ozdemir |
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The factor covariance matrix may be not pos def due to the combination of correlations among several latent variables - none has to be greater than 1. This suggests a misspecified model. I would break down the model and analyze its smaller parts to see where the problem occurs. |
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