Building H2O ------------ **During the build process, the following error message displays. What do I need to do to resolve it?** :: Error: Missing name at classes.R:19 In addition: Warning messages: 1: @S3method is deprecated. Please use @export instead 2: @S3method is deprecated. Please use @export instead Execution halted To build H2O, `Roxygen2 `__ version 4.1.1 is required. To update your Roxygen2 version, install the ``versions`` package in R, then use ``install.versions("roxygen2", "4.1.1")``. -------------- **Using ``./gradlew build`` doesn't generate a build successfully - is there anything I can do to troubleshoot?** Use ``./gradlew clean`` before running ``./gradlew build``. -------------- **I tried using ``./gradlew build`` after using ``git pull`` to update my local H2O repo, but now I can't get H2O to build successfully - what should I do?** Try using ``./gradlew build -x test`` - the build may be failing tests if data is not synced correctly.