Am a newbe to the Drools. When am trying http://www.softwarepassion.com/getting-started-with-drools-flow/ tutorial to run the program in this tutorial it is giving this exception Exception in thread "main" java.lang.NoSuchFieldError: DESCR at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:539) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28) at com.softwarepassion.droolsflow.SPDroolsFlowExample.readKnowledgeBase(SPDroolsFlowExample.java:30) at com.softwarepassion.droolsflow.SPDroolsFlowExample.main(SPDroolsFlowExample.java:20) how can i resolve this one -- View this message in context: http://drools.46999.n3.nabble.com/java-lang-NoSuchFieldError-DESCR-tp3290... Sent from the Drools: User forum mailing list archive at Nabble.com.