I had written many rules in my previous project and also successfully applied it's (Drools) most of the features .One of them is extend feature.But Currently I am writing rules using DSL but *I am not able to use extend feature using DSL Always getting Exception like root points to NULL expecting Then *even though my rules are correct ....I dnt know why this is happening. Could any one please share me it's sample example??? stuck badly :( -- View this message in context: http://drools.46999.n3.nabble.com/Is-it-possible-to-extend-rules-using-DR... Sent from the Drools: User forum mailing list archive at Nabble.com.