I am in the midst of converting a set of rules and rule-flows from Drools 5.1.0 to 5.3.0 During the execution of the primary rule-flow, we receive an exception which traces back to... *Caused by: java.lang.NoSuchFieldError: session at org.jbpm.process.instance.impl.MVELAction.execute(MVELAction.java:89) at org.jbpm.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionNodeInstance.java:47) at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:124) ...* This appears to occur in an action node that contains the following... * insert(context.getVariable("shipmentDocument")); insert(context.getVariable("shipmentLifecycle"));* The action node dialect is set to MVEL, and setting it to Java seems to cause the rule-flow to never exit the action node. The rule-flow and associated rules all work without error in our Drools 5.1.0 implementation. Any suggestions on why this might not be working in 5.3.0, and how I might go about fixing it? -- View this message in context: http://drools.46999.n3.nabble.com/NoSuchFieldError-session-tp4023263.html Sent from the Drools: User forum mailing list archive at Nabble.com.