Hi Marco, [I've send this answer to the drools user list, please post any follow ups on the user list instead of mailing it directly to me. You can use nntp://news.gmane.org #gmane.comp.java.drools.user if you want to keep your mailbox clean.] Drools Solver's xml configuration doesn't support <scoreDsl> entry's yet That shouldn't be to much work. I just created a JIRA for it: https://jira.jboss.org/jira/browse/JBRULES-2333 Patch welcome (attached to that jira) and I would apply it within a week on trunk. Short of doing the patch on trunk, you can do this workaround: - build the Solver directly yourself (basically just fisheye.jboss.org for XmlSolverConfigurer's code). Not recommended. - supply a an empty drl to <scoreDrl>, build the Solver, cast it to DefaultLocalSearchSolver and replace the rulebase. Both are not ideal in the long run though. With kind regards, Geoffrey De Smet Marco caminiti schreef: