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.java:544_) at org.drools.builder.impl.KnowledgeBuilderImpl.add(_KnowledgeBuilderImpl.java: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.java:470_) ... 3 more Caused by:_ org.drools.CheckedDroolsException_: Unable to find implementation for BusinessRuleProvider at org.drools.compiler.BusinessRuleProviderFactory.throwNoImplementationFound(_BusinessRuleProviderFactory.java:66_) at org.drools.compiler.BusinessRuleProviderFactory.loadProvider(_BusinessRuleProviderFactory.java:42_) at org.drools.compiler.BusinessRuleProviderFactory.getProvider(_BusinessRuleProviderFactory.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. ------------------------------------------------------------------------ _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users