Following is my code:

KnowledgeBuilderConfiguration kbc = KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration();

kbc.setProperty("drools.dialect.java.compiler", "JANINO");

KnowledgeBuilder builder = null;

builder = KnowledgeBuilderFactory.newKnowledgeBuilder(kbc);

Reader drlSource = new InputStreamReader(RVEngine.class.getResourceAsStream(ruleset.getDrlSource()));  //ruleset.getDrlSource() = com/cit/myDrl.dslr

Reader dslSource = new InputStreamReader(RVEngine.class.getResourceAsStream(ruleset.getDslSource()));

builder.add(ResourceFactory.newReaderResource(dslSource), ResourceType.DSL);

builder.add(ResourceFactory.newReaderResource(drlSource), ResourceType.DSLR);

 KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();

 kbase.addKnowledgePackages(builder.getKnowledgePackages());

no matter what I type in my dslr (drl) file I get the following exception on the highlighted line; ANY IDEA????

I have 1 rule or No rule it still throws the same exception. Does it have to do with any jar files?

Caused by: java.lang.NullPointerException

     at org.drools.compiler.PackageBuilder.validateUniqueRuleNames(PackageBuilder.java:830)

     at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:555)

     at org.drools.compiler.PackageBuilder.addPackageFromDslr(PackageBuilder.java:355)

     at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:461)

     at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)

saleem