[rules-dev] NPE when building package

I am getting a NPE when building a package with guvnor: java.lang.NullPointerException at org.drools.compiler.PackageBuilder.validateUniqueRuleNames(PackageBuilde r.java:826) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:548) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java :287) at org.drools.guvnor.server.builder.ContentPackageAssembler.loadDeclaredTyp es(ContentPackageAssembler.java:249) at org.drools.guvnor.server.builder.ContentPackageAssembler.preparePackage( ContentPackageAssembler.java:216) at org.drools.guvnor.server.builder.ContentPackageAssembler.<init>(ContentP ackageAssembler.java:103) at org.drools.guvnor.server.builder.ContentPackageAssembler.<init>(ContentP ackageAssembler.java:117) at org.drools.guvnor.server.ServiceImplementation.buildPackage(ServiceImple mentation.java:1366) at org.drools.guvnor.server.ServiceImplementation.buildPackage(ServiceImple mentation.java:1350) here is my package source: package MyTest import pack.EventVO import pack.ExtendedEventVO declare ExtendedEventVO @role( event ) end rule "Test" dialect "mvel" when ExtendedEventVO( ) then System.out.println("Hello World, events happen!!!") end rule 'TestEntryPoint' dialect 'mvel' when ExtendedEventVO() from entry-point eventDoor then System.out.println("Hello World, events happen!!!") end This seems like a possible BUG. Let me know, thanks --zoly