I'm using trunk (revision 10170), and I'm getting an error while asserting objects. It looks to be reproducible, in that it only happens with particular instances of one class. But since it's in a method of a generated class (the shadow proxy), I don't have a clue how to debug it. I had a look at the buildHashCode method in ShadowProxyFactory, but the magic was too thick for me. If it helps, the class being shadowed has boolean, float and long attributes, but no char, short, int, double or list. Here's the stacktrace: Exception in thread "RLIs Processor" java.lang.IncompatibleClassChangeError at net.juniper.dash.data.RLIRecordShadowProxy.hashCode(Unknown Source) at java.util.HashMap.put(HashMap.java:418) at java.util.HashSet.add(HashSet.java:194) at org.drools.reteoo.CollectNode.assertTuple(CollectNode.java:135) at org.drools.reteoo.CollectNode.assertObject(CollectNode.java:212) at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:145) at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:304) at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:176) at org.drools.reteoo.Rete.assertObject(Rete.java:121) at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:196) at org.drools.reteoo.ReteooWorkingMemory.doAssertObject(ReteooWorkingMemory.java:68) at org.drools.common.AbstractWorkingMemory.assertObject(AbstractWorkingMemory.java:729) at org.drools.common.AbstractWorkingMemory.assertObject(AbstractWorkingMemory.java:548) -- Dirk Bergstrom dirk(a)juniper.net _____________________________________________ Juniper Networks Inc., Computer Geek Tel: 408.745.3182 Fax: 408.745.8905