I am using drools 6.0.1 and I have the following test. public class DroolsTest { public DroolsTest() { } @Test public void work() throws InterruptedException, IOException, ClassNotFoundException { StringBuilder sb = new StringBuilder(); sb.append("package drools\n"); sb.append("import drools.MyObject;\n\n"); sb.append("declare MyObject\n" + " @role ( event )\n" + "end\n\n"); sb.append("rule \"Template2\"\n" + "\n" + "salience 0\n" + "dialect \"mvel\"\n" + "when\n" + " $s : MyObject(val==0)\n" + " not( MyObject(val==1, this after [0s,5s] $s ) )\n" + "\n" + "then\n" + " System.out.println(\"Template 2 fired\")\n" + " $s.name=\"2\";\n" + "\n" + "end\n"); KieServices kieServices = KieServices.Factory.get(); KieFileSystem kfs = kieServices.newKieFileSystem(); kfs.write("src/main/resources/rules.drl", sb.toString()); KieBuilder kieBuilder = kieServices.newKieBuilder(kfs); kieBuilder.buildAll(); Results results = kieBuilder.getResults(); assertFalse(results.hasMessages(Message.Level.ERROR)); if (results.hasMessages(Message.Level.WARNING)) { System.out.println("Warnings logged"); } KieContainer kieContainer = kieServices.newKieContainer(kieBuilder.getKieModule().getReleaseId()); KieBaseConfiguration kieBaseConfiguration = kieServices.newKieBaseConfiguration(); kieBaseConfiguration.setOption(EventProcessingOption.STREAM); KieBase kieBase = kieContainer.newKieBase(kieBaseConfiguration); KieSession ksession = kieBase.newKieSession(); MyObject one = new MyObject(); one.val = 0; FactHandle fh1 = ksession.insert(one); System.out.println("Insert one"); ksession.fireAllRules(); for (int i = 0; i < 13; i++) { System.out.println("Sleep:" + i); Thread.sleep(1000); //After 5 seconds, rule should fire } assertEquals("2", one.name); System.out.println("End"); ksession.halt(); ksession.dispose(); } public class MyObject implements Serializable { String name; int val; boolean fired; public String getName() { return name; } public void setName(String name) { this.name = name; } public int getVal() { return val; } public void setVal(int val) { this.val = val; } public boolean isFired() { return fired; } public void setFired(boolean fired) { this.fired = fired; } } } The rule is using + " $s : MyObject(val==0)\n" + " not( MyObject(val==1, this after [0s,5s] $s ) )\n" So, if a MyObject with val==0 is inserted, then after 5 seconds no MyObject with val==1 is found the rule will fire. This works in Drools 5.5.0 In 6.0.1 the rule doesn't fire. Please help. I want to use drools 6 but cannot with this problem. Thanks -- View this message in context: http://drools.46999.n3.nabble.com/Drools-6-0-1-Negative-Patterns-in-Strea... 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