I have some issues with the CIs in OpenMx_1.4-3532 and OpenMx_2.0.0-3575. I am fitting a random-effects meta-analysis with two effect sizes. My model was generated from the metaSEM package (metaSEM.model in the attached file). Another version was specified directly in OpenMx (mymodel in the attached file). This model worked fine. It was only used for comparisons. Both versions were supposed to be equivalent. The loglikelihoods and the parameter estimates were the same, while there were some issues on the CIs.
The files of test4a were based on OpenMx_1.4-3532. The lbound and the ubound of the CIs in metaSEM.model were the same.
The files of test4b were based on OpenMx_2.0.0-3575. The metaSEM.model worked fine with CSOLNP as the optimizer. The metaSEM.model generated NA in both the lbound and ubound with NPSOL as the optimizer. When I rerun the model, it threw an error.
Although these two models are equivalent, the model generated by the metaSEM package is more complicated in terms of model specification and number of matrices involved. This may partly explain the differences in the behaviors.
Any suggestions are welcome. Thanks in advance.