Just upgraded to the release candidate. I was using my own version of 5.6 that I had compiled a few months ago and everything was working fine. Almost every single rule file now throws this exception when it gets added to the knowledge base. java.lang.NoSuchMethodError: org.drools.base.ClassFieldReader.hasReadAccessor()Z at org.drools.base.ClassFieldAccessorStore.getReader(ClassFieldAccessorStore.java:129) at org.drools.base.ClassFieldAccessorStore.getReader(ClassFieldAccessorStore.java:104) at org.drools.rule.builder.PatternBuilder.getFieldReadAccessor(PatternBuilder.java:1572) at org.drools.rule.builder.PatternBuilder.buildRuleBindings(PatternBuilder.java:1123) at org.drools.rule.builder.PatternBuilder.buildCcdDescr(PatternBuilder.java:691) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:651) at org.drools.rule.builder.PatternBuilder.processConstraintsAndBinds(PatternBuilder.java:505) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:322) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:133) at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:67) at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:85) at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:3169) at org.drools.compiler.PackageBuilder.compileRules(PackageBuilder.java:1036) at org.drools.compiler.PackageBuilder.compileAllRules(PackageBuilder.java:944) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:936) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:468) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:698) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:51) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:40) Sent from my iPhone _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users