Hello all, We're getting the following exception executing our rules in Drools 5.2.1 : WARN: Execution of JMS message listener failed java.lang.NoClassDefFoundError: org/drools/factmodel/traits/Thing at org.drools.compiler.PackageBuilder.initBuiltinTypeDeclarations(PackageBuilder.java:332) at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:310) at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:205) at org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilder(KnowledgeBuilderFactoryServiceImpl.java:34) at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:46) at com.anteil.lazboy.lzbws.pricing.AddDRTDRLRFToKBuilder.<init>(AddDRTDRLRFToKBuilder.java:31) at com.anteil.lazboy.lzbws.pricing.PricingUploadJMSConsumer.<init>(PricingUploadJMSConsumer.java:30) at com.anteil.lazboy.lzbws.pricing.DealerPricingUploadConsumer.<init>(DealerPricingUploadConsumer.java:11) at com.anteil.lazboy.lzbws.pricing.PricingUploadJMSConsumer.getConsumer(PricingUploadJMSConsumer.java:64) at com.anteil.lazboy.lzbws.pricing.PricingUploadJMSConsumer.executeUpload(PricingUploadJMSConsumer.java:82) at com.lazboy.lzbws.jms.message.PricingUploadValidationRequest.onMessage(PricingUploadValidationRequest.java:60) at org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:518) at org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:479) at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:451) at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:323) at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:261) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:982) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:974) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:876) at java.lang.Thread.run(Thread.java:680) Caused by: java.lang.ClassNotFoundException: org.drools.factmodel.traits.Thing at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) ... 20 more The issue is that I can't seem to find the class org.drools.factmodel.traits.Thing in any Drools 5.2.1 modules. Can someone tell me the possible causes? Thanks in advance -- cheers Gurvinder -- View this message in context: http://drools.46999.n3.nabble.com/Runtime-Java-Exception-Firing-rules-Dro... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users