Re: [rules-users] KnowledgeAgent exception while trying to deserialize KnowledgeDefinitionsPackage

More careful reading of org.drools.rule.Package shows that readExternal and writeExternal aren't working on plain ObjectOutputStream in combination with change set monitoring. You must OutputStream os = new FileOutputStream( pkgPath ); ObjectOutputStream oos = new *Drools*ObjectOutputStream( os ); KnowledgePackage kPackage = kBuilder.getKnowledgePackages().iterator().next(); oos.writeObject( kPackage ); oos.close(); org.drools.common.DroolsObjectOutputStream - although justa renaming subclass of ObjectOutputStream - is not part of the "stable" API. -W On 16 June 2011 19:46, lhorton <LHorton(a)abclegal.com&gt; wrote: > That is what I was doing in my original source. Your code gives me the > same > original exception: > > Caused by: java.lang.ClassCastException: [B cannot be cast to > org.drools.rule.DialectRuntimeRegistry > > -- > View this message in context: > http://drools.46999.n3.nabble.com/rules-users-KnowledgeAgent-exception-wh... > Sent from the Drools: User forum mailing list archive at Nabble.com. > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users >