We are pleased to announce the official release of OpenMx version 2.21.13.  The last version of OpenMx for which we published an official release announcement was version 2.20.6, in February of 2022. Since then, we have quietly released versions 2.20.7, 2.21.1, 2.21.8, 2.21.10, 2.21.11, and 2.21.12, usually at the request of CRAN.  

The OpenMx users and the OpenMx Development Team have found a problem with the current implementation of the Satorra-Bentler scaled chi-squared difference test which is used for weighted least squares (WLS) models. The problem is isolated to models that use WLS, and further isolated to the use of mxCompare() with WLS. The statistics reported by summary() are unaffected. The anova() and mxCompareMatrix() functions are wrappers around mxCompare() and thus show the same problem. 

We are pleased to announce the official release of OpenMx version 2.20.6. Click here for instructions on how to install the package from our repository. As usual, our repository has package binaries for Windows and macOS, and source tarballs for Linux/GNU and other non-Mac Unix-likes, all of which come with the proprietary NPSOL optimizer. Alternately, users may install the fully open-source build of the new version from CRAN.

We are pleased to announce the official release of OpenMx version 2.19.8. Click here for instructions on how to install the package from our repository. As usual, our repository has package binaries for Windows and macOS, and source tarballs for Linux/GNU and other non-Mac Unix-likes, all of which come with the proprietary NPSOL optimizer. Alternately, users may install the fully open-source build of the new version from CRAN.

We are pleased to announce the official release of OpenMx version 2.19.1. Click here for instructions on how to install the package from our repository. As usual, our repository has package binaries for Windows and macOS, and source tarballs for Linux/GNU and other non-Mac Unix-likes, all of which come with the proprietary NPSOL optimizer. Alternately, users may install the fully open-source build of the new version from CRAN.

We are pleased to announce the official release of OpenMx version 2.17.2. Click here for instructions on how to install the package from our repository. As usual, our repository has package binaries for Windows and MacOS, and source tarballs for Linux/GNU and other non-Mac Unix-likes, all of which come with the proprietary NPSOL optimizer. Alternately, users may install the fully open-source build of the new version from CRAN.

We are pleased to announce the official release of OpenMx version 2.14.11. Click here for instructions on how to install the package from our repository. As usual, our repository has package binaries for Windows and MacOS, and source tarballs for Linux/GNU and other non-Mac Unix-likes, all of which come with the proprietary NPSOL optimizer. Alternately, users may install the fully open-source build of the new version from CRAN.

We are pleased to announce the official release of OpenMx version 2.13.2. Click here for instructions on how to install the package from our repository. As usual, our repository has package binaries for Windows and MacOS, and source tarballs for Linux/GNU and other non-Mac Unix-likes, all of which come with the proprietary NPSOL optimizer. Alternately, users may install the fully open-source build of the new version from CRAN.