JTransformer Installation



  • Install JDK/JRE (at least version 1.7.X)
  • Install Eclipse, version 4.6 (Neon) or above
  • Install SWI-prolog, version 6.6.0 (or above) for your platform.
    • Windows: Add the “bin” directory of your SWI-Prolog installation to the system PATH.
    • Linux: Download the SWI-Prolog sources and see the README.linux file for further instructions. Make sure that all dependencies are loaded correctly (see http://www.swi-prolog.org/build/unix.html).
    • Mac: Install MacPorts and type 'sudo port install swi-prolog'. Add'/opt/local/bin' to your system path (typically by adding it to the file /etc/paths).

If you use Java 1.7 and encounter memory problems, start Eclipse with the command line options-Xmx512m -XX:MaxPermSize=128m”.

Test your SWI-Prolog installation before you install the PDT or JTransformer. If you get PrologProcessException errors (containing messages such as “Failed to obtain session”, “Timout exceeded while waiting for peer to come up”, etc.) SWI-Prolog cannot be started from Eclipse. Then make sure that

  1. SWI-Prolog is installed,
  2. the SWI-Prolog executable “swipl-win” is in your path,
  3. your firewall does not block connections from Eclipse / Java to Prolog
  4. on MacOS: the X11 environment (XQuartz) is installed and running and the DISPLAY variable is properly set (see also the note below).

MacOS / Linux Troubleshooting: If you are using the PDT / JT and the graphical tracer (or any other part of SWI-Prolog that need the XQuartz / X11 environment) does not start:

  1. Open a terminal window
  2. Type “echo $DISPLAY”
  3. Copy the result line that is displayed
  4. Open the PDT preferences (Preferences > PDT > Prolog Processes)
  5. Select your current configuration on the right-hand side and click “Edit”
  6. Enter “DISPLAY=…what you copied…” into the “Extra environment variables” field
  7. If there are more entries there, separate them by a comma (,)

Installation via Update Site

Add the JTransformer Update Site to your Eclipse installation by entering one of the following URL in ”Help” → ”Install new Software…” → ”Add…”:

Update Site URL Release notes
4.7 Oxygen
4.6 Neon
latest http://sewiki.iai.uni-bonn.de/public-downloads/update-site-jt/latest/ build from
latest commit
4.7 Oxygen
4.6 Neon
http://sewiki.iai.uni-bonn.de/public-downloads/update-site-jt/ Release Notes
Older Versions
4.5 Mars
4.4 Luna
4.1.0 http://sewiki.iai.uni-bonn.de/public-downloads/update-site-jt/v4.1 Release Notes

Then select at least the “JTransformer” and “Prolog Development Tool” features. This is how it should look (except for the version number):

 JTransformer Update Site

Uncheck “Contact all update sites during install to find required software”, to avoid long connection times.

Press “Next” and follow the instructions.

Getting Started

The JTransformer Tutorial tells you how to set up your first JTransformer Project and write your first query.

Last modified: 2017/08/29 14:59