Hi, My first suggestion is: never use the word URGENT in the subject! 90% of the people that write to this list (me included) have "urgent" problems ;) Now, regarding to your question. In order to use a model in guvnor, you must upload it as a jar file. Once you have your jar uploaded, you can start authoring your rules in guvnor. Your applications can then get those rules (its sources or as a compiled package) to use them. Usually, applications don't modify the model classes: they don't create new classes nor add new attributes, etc. When you need to modify a class, then you need to upload the new version of you jar again. There are ways to do this programatically if you need to. Best regards, El dic 28, 2010 6:35 a.m., "sunkara007" <srinivas.sunkara(a)altisource.com&gt; escribió: Hi Team, I am evaluating Drools - Guvnor to use it in BPM suits. can you explain how the domain... View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/URGENT-Drools-Guvnor-... Sent from the Drools - User mailing list archive at Nabble.com. ____________________________________... _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users