org.drools.container.spring.beans.persistence.JPAKnowledgeServiceBean protected void initDao() { ..... jpaKnowledgeServiceProvider = node.get(JPAKnowledgeFactoryService.class); org.drools.grid.ExecutionNode: public <T> T get(Class<T> interfaceClass) { synchronized (interfaceClass) { Object service = services.get(interfaceClass); if (service == null) { try { Class<?> implementingClass = Class.forName(interfaceClass.getCanonicalName() + "Impl"); service = implementingClass.newInstance(); services.put(interfaceClass, service); } catch (Exception e) { throw new RuntimeException(e); } } return interfaceClass.cast(service); } Interface class ( JPAKnowledgeFactoryService ) is there, but when it tries to guess the implementation class ( Class.forName(interfaceClass.getCanonicalName() + "Impl"); ) it fails, because JPAKnowledgeFactoryServiceImpl does not exist anywhere in the trunk. Can this be checked in, or posted here on the forum? I am really close to integrate the two ( Drools [JPA] and Spring ) together. Thank you, /Anatoly -- View this message in context: http://n3.nabble.com/Missing-Artifact-JPAKnowledgeFactoryServiceImpl-tp74... Sent from the Drools - Dev mailing list archive at Nabble.com.