I am having a similar problem, but I'm using java 14 (for compatibility with a third party library): java.lang.NoClassDefFoundError: Validity/ScadenzaCalcolata at ASMAccessorImpl_140430961206010324450.getValue(Unknown Source) Could someone suggest another workaround? Is there a know bug? How can I check for bugs thanks, A. Switched from java 1.6 to java 1.5 and I don't have the problem anymore . So I guess there is some issue with functions and java 1.6 in release 4.0.4 --zoly ________________________________ From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Zoltan Farkas Sent: Tuesday, March 04, 2008 11:33 AM To: Rules Users List Subject: [rules-users] ClassNotFoundException when using a function in a rule Here is the exception: Exception in thread "mythread" java.lang.NoClassDefFoundError: com/daxtechnologies/optima/fault/eventprocessor/NewEvent at ASMAccessorImpl_716163221204646531490.getValue(Unknown Source) at org.mvel.ASTNode.getReducedValueAccelerated(ASTNode.java:174) at org.mvel.MVELRuntime.execute(MVELRuntime.java:88) -- View this message in context: http://www.nabble.com/Executing-BRMS-Snap-shot-tp15819564p16091916.html Sent from the drools - user mailing list archive at Nabble.com.