Message/Author 

anonymous posted on Tuesday, January 17, 2006  9:26 am



I have an interaction in my model between two latent variables. I got this error message. Any suggestions to solve it? Thank you. THERE IS NOT ENOUGH MEMORY SPACE TO RUN THE PROGRAM ON THE CURRENT INPUT FILE. THE ANALYSIS REQUIRES 7 DIMENSIONS OF INTEGRATION RESULTING IN A TOTAL OF 0.17086E+09 INTEGRATION POINTS. THIS MAY BE THE CAUSE OF THE MEMORY SHORTAGE. YOU CAN TRY TO REDUCE THE NUMBER OF DIMENSIONS OF INTEGRATION OR THE NUMBER OF INTEGRATION POINTS. 


It is not realistic to estimate a model with seven dimensions of integration. We discuss this in the Mplus User's Guide. I don't know what your seven dimensions of integration come from, but I suggest rethinking your model so that you have no more than three or four dimensions of integration. 

Alex Mason posted on Thursday, January 19, 2006  2:44 pm



Is it accurate to say that the latent variable interaction procedure in Mplus 3.13 implements the QuasiMaximumLikelihood (QML) approach referred to in the Marsh et al. (2004) Psychological Methods paper and the Klein papers? Thanks! 


The implementation in Mplus is fullinformation maximum likelihood not quasimaximum likelihood. 


I have one question about MPlus. QML belongs to the mew generation of methods for analyzing nonlinear effects. Could QML approach be implemented in MPlus Version 3 or Version 4? Thanks a lot! 


If you are referring to Klein's recent QML approach for models with latent variable interactions, the answer is no. 


Hi, I am running some latent variable level moderation effects. I do have success to run them, but I also have encountered this error message a few times: THE MODEL ESTIMATION DID NOT TERMINATE NORMALLY DUE TO A CHANGE IN THE LOGLIKELIHOOD DURING THE LAST E STEP. AN INSUFFICENT NUMBER OF E STEP ITERATIONS MAY HAVE BEEN USED. INCREASE THE NUMBER OF MITERATIONS OR INCREASE THE MCONVERGENCE VALUE. ESTIMATES CANNOT BE TRUSTED. SLOW CONVERGENCE DUE TO PARAMETER 53. THE LOGLIKELIHOOD DERIVATIVE FOR THIS PARAMETER IS 0.24835653D+00. There are times when I increase the number of iterations, the model would eventually converge, but there are times when nothing else can be done. Are there anything I can do to modify the model without changing the causa relationships that will allow me to assess the moderation effects? Thanks. 


Try increasing the number of MITERATIONS. 


Hi Linda, just tried iterations = 1000, but it still shows the same error message. Please advise? 


Sorry, it was miterations = 1000. 


You can send the output and your license number to support@statmodel.com and we can take a look at it. 


Hi Linda, I have just tried MITERATIONS = 10000, and the model converged. What is the maximum miteration for a model to be estimated? If the same problem happen, do I just keep increasing the number of MITERATIONS? Thanks. Sabrina 


There is no maximum. If the error message suggests this, try it. 


Hi, Is it possible in Mplus to test an interaction between latent variables using WLSMV? (the observed indicators for each latent variables are categorical)? Thank you Simon 


No, this is available for only ML and Bayes. 

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