[ https://issues.redhat.com/browse/DROOLS-5668?page=com.atlassian.jira.plug... ] Sylvain Lemoine commented on DROOLS-5668: ----------------------------------------- In the reproducer, I think that I serialized / deserialized the session not the kiebase in 7.0.0: {code:java} Marshaller marshaller = MarshallerFactory.newMarshaller(kieBase); final long l = System.currentTimeMillis(); Path path = Paths.get(TMP_DIR, +l + "_drools_7.0.0_session"); try (OutputStream os = new FileOutputStream(path.toFile())) { marshaller.marshall(os, kieSession); }{code} and then I read it back in 7.43.1 {code:java} KieServices kieServices = KieServices.Factory.get(); KieContainer kContainer = kieServices.getKieClasspathContainer(); KieBase kieBase = kContainer.getKieBase(); Marshaller marshaller = MarshallerFactory.newMarshaller(kieBase); try (InputStream is = new FileInputStream(file)) { marshaller.unmarshall(is); }{code}   did I miss something here ?     -- This message was sent by Atlassian Jira (v7.13.8#713008)