I have a rule in which I use objects of a class X. I compiled and packaged this rule using BRMS for which I uploaded a jar containing class X as the model. I use a rule agent to build a rulebase from this package. Now, when I pass the facts of type X to the rule engine, I get a ClassCastException saying that "X is incompatible with Y". Y is a subclass of X, but the problem is that a subclass object cannot be assigned to a superclass type. That means at some point, Y is getting loaded instead of X. I'm trying to identify at which point this is happening. In the above case, when does the class loading happen for the types used in a rule? Is it at step 1, 2 or 3 ? 1. When the rule is compiled using MVEL? 2. When the rule is called the first time? 3. When the rulebase is built from the package? Thanks, Seema -- View this message in context: http://www.nabble.com/Class-loading-for-facts-used-in-rules-tp23649584p23... 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