I estimate a model with some simple linear constraints. The OpenMx input is provided in the attached document. My data set contains a lot of missing values so I use FIML. With OpenMx Version 0.4.1-1320 the model runs smoothly and yields correct results. I also attach the output for your information. The results and LL are exactly identical to Mplus version 5.1 (I also attach this output for your information), so I am confident that these results are indeed correct. However, when running the same model in OpenMx Version 1.0.0-1448 I get the error message "In model 'ADMunequal' NPSOL returned a non-zero status code 6. The model does not satisfy the first-order optimality conditions to the required accuracy, and no improved point for the merit function could be found during the final linesearch (Mx status RED) ". As a consequence, all parameter estimates are completely off (I attach the output below). What went wrong?
Thank you very much for your help!
|MxVersionComparison.doc ||51 KB|