Non-Positive Definite Between Level M... PreviousNext
Mplus Discussion > Multilevel Data/Complex Sample >
 Anonymous posted on Saturday, April 23, 2005 - 2:53 pm
I am trying to develop multiple level path analysis. When I have a restricted number of variables (n=6), I am able to perform the analysis. However, I discovered theoretical reasons to disaggregate a few of the measures, but not enough for Multilevel SEM. When I do this, I end up with a non-positive definite matrix at the between level. Any suggestions as to why and how to fix this problem?

My level-2 n=29 and my level-1 n=447. There are two variables at level-2 and eight level-1 variables. I can't understand why the disaggregation would generate such problems. Any thoughts?
 Anonymous posted on Saturday, April 23, 2005 - 5:24 pm
I was able to figure out a proper start value that did the trick.
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