Hello, I have imported bunch of rules (.drl file) into the Guvnor. Then I imported the Jar file containing the Facts and my Custom Operator and also the static methods into the same "Guvnor package of the rules. When I try to validate the rules, I am getting errors saying that it is not able to fund the given field in the Fact. None of the rules validate. They always complain that what ever filed that is referenced in the Fact by the rule, it doesn't exist. Any ideas please? Also how do I veiew/verify that my jar file was loaded OK . ( Can I check/verify the model classes to see if they were loaded Okay?) Also how do I delete unwanted/old model category or for that matter any assets? Thanks in advance Matt'M -- View this message in context: http://drools.46999.n3.nabble.com/Drools-Guvnor-Rule-validation-fails-Not... Sent from the Drools: User forum mailing list archive at Nabble.com.