[rules-dev] Error when adding custom evaluator to Guvnor

I'm running a JBoss AS 4.2.3 instance to deploy Drools Guvnor as well as a service (MyApp) which interacts with it (downloads the compiled packages from Guvnor, and fires the rules based on requests sent to it). In this service, I've defined a custom evaluator definition "InRangeOfEvaluatorDefinition". This evaluator works as expected when firing rules loaded from the file system. However, when compiling a package in Guvnor which uses the evaluator, the following exception is thrown: java.lang.ClassCastException: com.my.app.InRangeOfEvaluatorDefinition cannot be cast to org.drools.base.evaluators.EvaluatorDefinition 11:15:25,834 ERROR [STDERR] Caused by: java.lang.ClassCastException: com.my.app.InRangeOfEvaluatorDefinition cannot be cast to org.drools.base.evaluators.EvaluatorDefinition 11:15:25,835 ERROR [STDERR] at org.drools.base.evaluators.EvaluatorRegistry.addEvaluatorDefinition(EvaluatorRegistry.java:128) I've added the definition to drools-guvnor.war/META-INF/drools.packagebuilder.conf: drools.evaluator.inrangeof = com.my.app.InRangeOfEvaluatorDefinition My first guess would be that MyApp and Guvnor use different versions of org.drools.base, but both seem to use Drools 5.1.1 (same JAR sizes). Any ideas would be appreciated. Thanks in advance! -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Error-when-adding-cus... Sent from the Drools - Dev mailing list archive at Nabble.com.