Hi all! After installing Eclipse 3.2.1, I downloaded drools Eclipse IDE 3.0.4 plugin from JBoss site and put it in the plugins folder of eclipse home dir. Then restart eclipse, then File -> New -> Project -> JBoss Rules -> New Rules Project. I give a name for the project and click Finish. This has create the project with two automatically created source folders namely src/java and src/rules. In src/java, I can see com.samples.DroolsTest.java which uses the rule Sample.drl in src/rules. But I obtained some errors in code(the bold lines), like: - the method newWorkingMemory() is undefined for ruleBase type - the method fireAllRules () is undefined for workingMemory type - the method addPackage(pkg) is undefined for ruleBase type //load up the rulebase RuleBase ruleBase = readRule(); WorkingMemory workingMemory = ruleBase.newWorkingMemory(); //go ! Message message = new Message(); message.setMessage( "Hello World" ); message.setStatus( Message.HELLO ); workingMemory.assertObject( message ); workingMemory.fireAllRules(); ....................................................... //get the compiled package (which is serializable) Package pkg = builder.getPackage(); //add the package to a rulebase (deploy the rule package). RuleBase ruleBase = RuleBaseFactory.newRuleBase(); ruleBase.addPackage( pkg ); Please tell me what is the problem. Regards, Alan. --------------------------------- Sponsored Link Degrees online in as fast as 1 Yr - MBA, Bachelor's, Master's, Associate - Click now to apply