AHYOUNG posted on Wednesday, October 14, 2015 - 1:55 pm
I'm running a second order model but getting this warning message: THE LATENT VARIABLE COVARIANCE MATRIX (PSI) IS NOT POSITIVE DEFINITE...PROBLEM INVOLVING VARIABLE F1. The model is this: c@1; f1 BY u1-u12; f2 BY u13-u28; f3 BY u29-u42; f4 BY u43-u50; f5 BY u51-u53; c BY f1* f2-f5; I see that the residual for F1 is negative and the estimated correlation between c and f1 is over 1. The problem was solved when I fixed the residual for f1 as 0 by adding "f1@0;"in the code. But I would like to know if there is any other way to solve the problem besides this. Thanks for your help in advance!