Is there a better way to handle Decision Table (XSL files) with Drools version 4.0.7? In Drools 2.1, I can do the following; file = new File(dir, XSL_filename); InputStream stream = null; RuleBase ruleBase = null; WorkingMemory wm = null; try { stream = new FileInputStream(file); } catch{... } try{ ruleBase = DecisionTableLoader.loadFromInputStream(stream); WorkingMemory wm = ruleBase.newWorkingMemory(); } catch{ ... } In Drool 4.0.7, I tried the following file = new File(dir, XSL_filename); InputStream stream = null; RuleBase ruleBase = null; try { stream = new FileInputStream(file); } catch{... } try{ ruleBase = RuleBaseFactory.newRuleBase(); PackageBuilder builder = new PackageBuilder(); SpreadsheetCompiler sCompiler = new SpreadsheetCompiler(); String drl = sCompiler.compile(stream, InputType.XLS); builder.addPackageFromDrl(new StringReader(drl)); ruleBase.addPackage(builder.getPackage()); WorkingMemory wm = ruleBase.newStatefulSession(); } catch{ ... } Thanks, Hong