Hi, Greetings! My project uses Drools 2.1 and we are migrating from 2.1 to 3.0. I have converted the 2.1 drools rules file to 3.0. Please find attached the same. But when i am running this rule it is giving me *DroolsParserException* [*(null: 1, -1): Document root element is missing.*] I have verified the xml and it seems ok to me. Please let me know is there anything wrong in the XML. or Where else can be the problem? Your help will be highly appreciated. Thanks & Regards, Vishal