Gary Struthers [http://community.jboss.org/people/GaryS] created the discussion "Process variables, rules, Gateway constraints" To view the discussion, visit: http://community.jboss.org/message/616560#616560 -------------------------------------------------------------- I followed Accessing process variables in rule-task (http://community.jboss.org/message/607839#607839) http://community.jboss.org/message/607839#607839#607839 http://community.jboss.org/message/607839#607839 But I'm starting a new thread because I have new problems and that thread was marked as answered. I'm missing something important about how to handle variables in rules and constraints but I can't find it. A JUnit4 test fails when I call fireAllRules() org.drools.RuntimeDroolsException: Unexpected exception executing action org.jbpm.process.instance.event.DefaultSignalManager$SignalAction@3e4ac866           at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1000)           at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:733)           at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:702)           at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218)   @Test public void assignApplication() throws Exception {   // given                     StatefulKnowledgeSession kSession = createKnowledgeSession(getKbase());                     String ready = new String("false");                     String assignLHS = new String("true");                     Map<String, Object> params = new HashMap<String, Object>();                     params.put("ready", ready);                     params.put("assignLHS", assignLHS);                     ProcessInstance pi = kSession.startProcess("dummy", params); this.assertNodeTriggered(pi.getId(), "Start","AddPiFact", "Assign Application");                     kSession.fireAllRules(); AddPiFact is a script immediately after Start with this action: *import* org.drools.runtime.KnowledgeContext *import* org.drools.runtime.KnowledgeRuntime kcontext.getKnowledgeRuntime().*insert*(kcontext.getProcessInstance()); The rule is supposed to set "ready" if "assignLHS" is true import org.drools.runtime.process.WorkflowProcessInstance rule "applicationReady"     ruleflow-group "assignApplication" when         $process: WorkflowProcessInstance()         $assignLHS :String() from (String)$process.getVariable("assignLHS"); eval($assignLHS == "true"); then         $process.setVariable("ready", "true"); update($process); end I want an XOR Gateway to use "ready" in its Constraints but if I write it like return ready.compareIgnoreCase("true"); The KnowledgeBuilder has an error that "ready" can't be resolved. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/616560#616560] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]