Subhas Sing [http://community.jboss.org/people/popsubhas] created the discussion "Re: JBPM and Drool sample application throwing an Exception." To view the discussion, visit: http://community.jboss.org/message/562961#562961 -------------------------------------------------------------- Thanks Felix and Maciej. Delete all jars except as following ============== log4j.jar mail.jar slf4j-api-1.5.8.jar slf4j-log4j12.jar spring.jar Copy these following jars from jBPM 4.4 distribution ================= antlr-runtime.jar antlr.jar commons-collections.jar core.jar dom4j.jar drools-api.jar drools-compiler.jar drools-core.jar hibernate-core.jar hsqldb.jar javassist.jar jbpm.jar jta-1.1.jar juel-api.jar juel-engine.jar juel-impl.jar mvel2.jar Change the code as per Maciej ======================== repositoryService.createDeployment().addResourceFromClasspath("hello_world.jpdl.xml"). addResourceFromClasspath("checkAnalystAvailable.drl"). deploy(); rule "checkAnalystAvailable"   when     analystFinder : com.felix.poc.AnalystFinder( analyst=="FELIX", region == "BELGIUM" )   then      analystFinder.setAnalystAvailable( *true* );      System.out.println( "Checking.........." ); end -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/562961#562961] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]