Bivariate latent growth with latent m... PreviousNext
Mplus Discussion > Growth Modeling of Longitudinal Data >
Message/Author
 April Masarik posted on Tuesday, September 24, 2013 - 3:13 pm
Hello Drs. Muthen,

I am trying to run a bivariate latent growth model with a latent interaction between one of the intercepts and another variable that is observed (but have made it latent by fixing the variance @0). For example:

z by variable@1;
variable@0;

Then, I specify a latent interaction that I want to predict to a slope:

interact | interceptX XWITH z;
slopeY on interact;

I correlate the residuals across processes at each time point; however,
I get the following error message:

THE ESTIMATED COVARIANCE MATRIX COULD NOT BE INVERTED.

COMPUTATION COULD NOT BE COMPLETED IN ITERATION 1.

CHANGE YOUR MODEL AND/OR STARTING VALUES.

Any suggestions to get this model to run? It might be more helpful if I send you all my files. Please let me know and thank you in advance.
 Linda K. Muthen posted on Tuesday, September 24, 2013 - 5:35 pm
Please send the output and your license number to support@statmodel.com.
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