Drools plugin Rete Tree viewer does not work with timer and || operator. ------------------------------------------------------------------------ Key: DROOLS-320 URL: https://issues.jboss.org/browse/DROOLS-320 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Affects Versions: 6.0.0.CR5 Environment: Mac OS-X 10.9, JBoss Developer Studio 7, Oracle Hotspot 1.7.0_45, Drools-jBPM Eclipse plugin 6.0.0.CR5 Reporter: Duncan Doyle Assignee: Mark Proctor Labels: drools, eclipse, plugin, rete, tree, view See this example project: https://github.com/DuncanDoyle/DroolsReteViewer , which is based on the Drools Eclipse sample project. The 'src/main/resources/rules/Sample.drl' is a valid DRL file, but it cannot be opened in the Rete Tree because of: - the 'timer (int: 10s)' definition in rule "GoodBye-Timer". This gives the error: Rete Tree Build Error! Reason: org.drools.core.RuntimeDroolsException: java.lang.reflect.InvocationTargetException: [Rete(0)] - the '||' operator in the rule "Hello World-Or". This gives the error: Rete Tree Build Error! Reason: java.lang.NullPointerException: null This forces us to change our rule definition files to be able to inspect the Rete Tree (which we require to analyse the tree for possible optimizations).