The semtree program is a package for the R programming language. Please install R first:

Get R:


To download and install the semtree package from CRAN (, type the following command in your R prompt:


This will install the latest, stable version. Please note: The package is still considered beta status.

The source code and the latest developer version can be found on github:

Note that OpenMx provides different versions on CRAN and on their website. To install the non-CRAN compatible website using the NPSOL optimizer, install OpenMx from their website:

Get OpenMx: