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Mplus Discussion > Latent Variable Mixture Modeling >
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 Dylan John posted on Friday, August 04, 2017 - 2:01 pm
I am trying to conduct an LTA in Mplus and am getting the following error(s). Unfortunately I am working in a secure datacentre and they will not let me vet the output data. Could anyone help me troubleshoot this (input syntax in comments):

THE BEST LOGLIKELIHOOD VALUE HAS BEEN REPLICATED. RERUN WITH AT LEAST TWICE THE RANDOM STARTS TO CHECK THAT THE BEST LOGLIKELIHOOD IS STILL OBTAINED AND REPLICATED.

THE MODEL ESTIMATION DID NOT TERMINATE NORMALLY DUE TO A NON-POSITIVE DEFINITE FISHER INFORMATION MATRIX.CHANGE YOUR MODEL AND/OR STARTING VALUES.

THE MODEL ESTIMATION HAS REACHED A SADDLE POINT OR A POINT WHERE THE OBSERVED AND THE EXPECTED INFORMATION MATRICES DO NOT MATCH. THE CONDITION NUMBER IS -0.459D-05. THE PROBLEM MAY ALSO BE RESOLVED BY DECREASING THE VALUE OF THE MCONVERGENCE OR LOGCRITERION OPTIONS.

THE STANDARD ERRORS OF THE MODEL PARAMETER ESTIMATES COULD NOT BE
COMPUTED. THIS IS OFTEN DUE TO THE STARTING VALUES BUT MAY ALSO BE AN INDICATION OF MODEL NONIDENTIFICATION. CHANGE YOUR MODEL AND/OR STARTING VALUES. PROBLEM INVOLVING THE FOLLOWING PARAMETER:
Parameter 27, X2#3 ON X1#4

RESULTS ARE PRESENTED FOR THE MLF ESTIMATOR.

THE MODEL ESTIMATION TERMINATED NORMALLY
 Dylan John posted on Friday, August 04, 2017 - 2:04 pm
Variable:
Names are modc_t1 modc_t2 modc_t3;
Missing are all (999) ;
usevariables = modc_t1 modc_t2 modc_t3;
nominal are modc_t1 modc_t2 modc_t3;
classes = x1(4) x2(4) x3(4);
Analysis:
Type = mixture ;
starts = 500 50;
proc = 4 (starts);
parameterization = probability;
 Dylan John posted on Friday, August 04, 2017 - 2:05 pm
model:
%overall%
x3 on x2;
x2 on x1;

model x1:
%x1#1%[modc_t1#1@3.974 modc_t1#2@-9.810 modc_t1#3@-3.92];
%x1#2%[modc_t1#1@0.632 modc_t1#2@-0.825 modc_t1#3@3.004];
%x1#3%[modc_t1#1@-5.030 modc_t1#2@4.304 modc_t1#3@1.979];
%x1#4%[modc_t1#1@-1.454 modc_t1#2@-6.192 modc_t1#3@-2.424];
 Dylan John posted on Friday, August 04, 2017 - 2:05 pm
model x2:
%x2#1%[modc_t2#1@2.585 modc_t2#2@0.302 modc_t2#3@1.138];
%x2#2%[modc_t2#1@-2.272 modc_t2#2@-4.674 modc_t2#3@-7.823];
%x2#3%[modc_t2#1@3.623 modc_t2#2@0.302 modc_t2#3@1.138];
%x2#4%[modc_t2#1@7.417 modc_t2#2@7.922 modc_t2#3@11.933];

model x3:
%x3#1%[modc_t3#1@13.786 modc_t3#2@10.013 modc_t3#3@8.765];
%x3#2%[modc_t3#1@-7.289 modc_t3#2@-4.792 modc_t3#3@-2.527];
%x3#3%[modc_t3#1@4.877 modc_t3#2@6.092 modc_t3#3@3.142];
%x3#4%[modc_t3#1@0.975 modc_t3#2@0.921 modc_t3#3@3.893];
 Bengt O. Muthen posted on Friday, August 04, 2017 - 2:26 pm
We ask that posts do not exceed one window. Instead, send output to Support along with your license number.
 Dylan John posted on Friday, August 04, 2017 - 2:33 pm
Apologies for posting the syntax on here.

Unfortunately the secure datacentre that I am working at will not allow me to vet the output documents, so I am not able to take them out of the datacentre (Which has no internet).

The only thing I was allowed to take out of the datacentre was the error message and I already had my input.

Without seeing the output, is there anything you can suggest to me for troubleshooting?

Thank you
 Dylan John posted on Saturday, August 05, 2017 - 6:59 am
I am currently trying to finish my graduate thesis, so any help would be greatly appreciated.
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