Hi all,
I'm running a Qualitative Sex Differences ACE model and I'm using the mxRefModels to get the reference models, but for some variables I get a error:
>mxRefModels(QualAceFit_rg, run = T) Error in chol.default(sampcov) : the leading minor of order 1 is not positive definite > mxVersion() OpenMx version: 2.3.1 [GIT v2.3.1] R version: R version 3.2.1 (2015-06-18) Platform: x86_64-w64-mingw32 Default optimiser: NPSOL
If I define the Saturated and the Independence models by hand, then there doesn’t seem to be a problem, it runs and converges correctly. Could someone help, what might be the problem with mxRefModels? It's a great function, really speeds up things, I hope I can use it for these models also.