https://help.pentaho.com/Documentation/5.2/0F0/0G0/020 Prepare Environment To prepare the computer on which you plan to install the BA design tool and plugins, complete these tasks. Install Java JRE or JDK . Set environment variables . Install Java JRE or JDK Make sure that the version of the Java Runtime Environment (JRE) or the Java Development Kit (JDK) that Pentaho needs to run is installed on your system. You do not need to uninstall other versions of Java if you already have them running on your system. These instructions explain how to check for your default version of Java that is running on your computer and where to get the required version if you need one. Check the supported technologies list to see which version of the JRE or JDK is needed for the software. If you have not done so already, log into the computer on which you plan to install the software. Ensure t...