[rules-users] Unable to find implementation for BusinessRuleProvider

Hi, I've been experimenting with the Guided Rule Editor plug-in in Eclipse. I've built a Drools Project using the default Hello World sample application. I've created a new "Guided Rule" in my project called "GuidedRule.brl" and get the associated "drools.package" with it. The rule is simple: WHEN THEN System.out.println("Rule has fired"); I build the knowledge base as follows: private static KnowledgeBase readKnowledgeBase() throws Exception { KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); kbuilder.add(ResourceFactory.newClassPathResource("SampleGuided.drl"), ResourceType.BRL); KnowledgeBuilderErrors errors = kbuilder.getErrors(); if (errors.size() > 0) { for (KnowledgeBuilderError error: errors) { System.err.println(error); } throw new IllegalArgumentException("Could not parse knowledge."); } KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(); kbase.addKnowledgePackages(kbuilder.getKnowledgePackages()); return kbase; } The only line changed is adding the resource of type BRL. When I try to run, I get the following error: java.lang.RuntimeException: org.drools.compiler.DroolsParserException: org.drools.CheckedDroolsException: Unable to find implementation for BusinessRuleProvider at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.j ava:544) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.ja va:28) at com.sample.DroolsTest.readKnowledgeBase(DroolsTest.java:41) at com.sample.DroolsTest.main(DroolsTest.java:23) Caused by: org.drools.compiler.DroolsParserException: org.drools.CheckedDroolsException: Unable to find implementation for BusinessRuleProvider at org.drools.compiler.PackageBuilder.addPackageFromBrl(PackageBuilder.java :386) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.j ava:470) ... 3 more Caused by: org.drools.CheckedDroolsException: Unable to find implementation for BusinessRuleProvider at org.drools.compiler.BusinessRuleProviderFactory.throwNoImplementationFou nd(BusinessRuleProviderFactory.java:66) at org.drools.compiler.BusinessRuleProviderFactory.loadProvider(BusinessRul eProviderFactory.java:42) at org.drools.compiler.BusinessRuleProviderFactory.getProvider(BusinessRule ProviderFactory.java:25) at org.drools.compiler.PackageBuilder.addPackageFromBrl(PackageBuilder.java :366) ... 4 more I've tried variations to add the drools.package as a PKG type, I've had the rules (and package) in both "com.sample" and /src/main/rules, but I can't seem to resolve the problem. "drools.package" has been updated to include the package name (package com.sample;) and I import the message class as well (even though it isn't being used currently). I suspect the issue is simple, but I haven't been able to figure it out. Any help would be appreciated.