==== Problems in Molgenis update ====
 * After last update from molgenis3_3 , compilation errors:
   * Revealed an error in model :
     * Entity patient contained a field : Syndrome_id , from the old table Syndrome ,which now is User .  user_id xref already exists .
       * Changed it in        *                 <field name="PatientID" type="autoid" />
       * since there wasn't any primary key in the table(!) .
       * Also delete database , delete generated folder ,  Molgenis Generate again....
       * Open mysql as root :
         * mysql> create database hvp_pilot;
         * * mysql> grant all privileges on hvp_pilot.* to molgenis@localhost identified by 'molgenis'; flush privileges;
       * Clear & delete tomcat, run -->
         * Error :
           * "The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: !.:/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java"
         * Solution : http://www.liferay.com/web/guest/community/wiki/-/wiki/Main/Tomcat+Native+Library
         * Install tomcat native :   sudo port install tomcat-native &
           * From the '''Terminal''' program, make symbolic links from the /opt/local/lib/libtcnative-1.* to /usr/lib/!java:sudo ln -s /opt/local/lib/libtcnative-1.* /usr/lib/java
         * Delete & restart :
           * * SEVERE: An incompatible version 1.1.14 of the APR based Apache Tomcat Native library is installed, while Tomcat requires version 1.1.17
           * http://old.nabble.com/Tomcat-5.5.16---Error-configuring-application-listener-of-class-listeners.ContextListener-to3440834.html#a3487618
     * Another revealed error :
       * java.io.IOException: Cannot run program "dot": error=2, No such file or directory
         * later : install graphviz
     * Created a new project in workspace in order to debug . potential problem in lucene code ??
       * the problem is the naming of fields in DB ?