_____ PackageBuilderConfiguration conf=new PackageBuilderConfiguration(); conf.setCompiler(PackageBuilderConfiguration.JANINO); //Building package builder with defined configuration final PackageBuilder builder=new PackageBuilder(conf); //Class ab=null; try { //FileInputStream fs=new FileInputStream("C:\\jdevstudio10133\\jdev\\mywork\\ServletApplication\\Proj ect1\\src\\project1\\Test.drl"); //ab=Class.forName("project1.RuleTest2"); //builder.addPackageFromDrl(new InputStreamReader(ab.getResourceAsStream("Test.drl"))); builder.addPackageFromDrl(new InputStreamReader(getClass().getResourceAsStream("/Test.drl"))); } catch(Exception e) { System.out.println("Error!"+e.getMessage()); } //building rule base final RuleBase ruleBase=RuleBaseFactory.newRuleBase(); ruleBase.addPackage(builder.getPackage());//adding package to the rule base final WorkingMemory workingMemory=ruleBase.newWorkingMemory();//creating new working memory final FactHandle fa=workingMemory.assertObject(taskObj);//asserting received object from caller workingMemory.fireAllRules();//firing rules This is my code snippet. It gives me Null value Exception every time I run the code. Can any one help me. Tushar DISCLAIMER ========== This e-mail may contain privileged and confidential information which is the property of Persistent Systems Ltd. It is intended only for the use of the individual or entity to which it is addressed. If you are not the intended recipient, you are not authorized to read, retain, copy, print, distribute or use this message. If you have received this communication in error, please notify the sender and delete all copies of this message. Persistent Systems Ltd. does not accept any liability for virus infected mails.