Hi Group Members, I have checked out Drools source from http://anonsvn.labs.jboss.com/labs/jbossrules/branches/4.0.x/ on 7th March,2008. After that I have tested some scenarios/use cases, which are required for our use. 1. *'Add Pkg/Rule with serialized RuleBase & Working Memory'* use case is working fine, except some special scenarios [ I have mentioned them in the attached file DynamicRulesMoreTest)]. 2. *'Remove Pkg/rule with serialized RuleBase & Working Memory'* use case is not working. I have attached the Test scenarios & Rule(s) . Please help me, if I am doing some thing wrong. Above 2 use cases are very important for us, to use *"Drool"* in our application*.* Regards Siddhartha