Drools 5.1.1

I create a package from a decision table:

                                ObjectOutputStream out;

                                try {

                                                out = new ObjectOutputStream(new FileOutputStream(“venue.pkg”));

                                                out.writeObject(knowledgeBase.getKnowledgePackages()); // knowledgeBase previously loaded from spreadsheet

                                                out.close();

                                } catch (IOException ex) {

                                                logger.debug(ex.getMessage());

                                }

I can load this package directly into a knowledge base and run rules with no errors:

                                ObjectInputStream in;

                                Collection<KnowledgePackage> packages = null;

                                try {

                                                in = new ObjectInputStream(new FileInputStream(“venue.pkg”));

                                                packages = (Collection<KnowledgePackage>) in.readObject();

                                                in.close();

                                } catch (Exception ex) {

                                                logger.debug(ex.getMessage());

                                }

                                knowledgeBase.addKnowledgePackages(packages);

HOWEVER if I try to load the same package using a knowledge agent:

                                KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent("TheAgent");

                                kagent.applyChangeSet(ResourceFactory.newFileResource(“ChangeSet.xml”));

The package does not load.  Any idea of the cause of these exceptions?

[2011:06:165 10:06:159:info] ResourceChangeNotification created

[2011:06:165 10:06:161:info] ResourceChangeScanner reconfigured with interval=60

[2011:06:165 10:06:161:info] ResourceChangeScanner created with default interval=60

[2011:06:165 10:06:162:debug] ResourceChangeNotification monitor added monitor=org.drools.io.impl.ResourceChangeScannerImpl@5c73a7ab

[2011:06:165 10:06:163:debug] KnowledgeAgent building resource map

[2011:06:165 10:06:163:info] KnowledegAgent has started listening for ChangeSet notifications

[2011:06:165 10:06:163:info] KnowledgeAgent created, with configuration:

monitorChangeSetEvents=true scanResources=true scanDirectories=true newInstance=true

[2011:06:165 10:06:413:info] KnowledgeAgent applying ChangeSet

[2011:06:165 10:06:415:debug] KnowledgeAgent notifier subscribing to resource=[ClassPathResource path='com/abclegal/rules/resources/venue.pkg']

[2011:06:165 10:06:415:debug] ResourceChangeNotification subscribing listener=org.drools.agent.impl.KnowledgeAgentImpl@5fe0f2f6 to resource=[ClassPathResource path='com/abclegal/rules/resources/venue.pkg']

[2011:06:165 10:06:416:debug] ResourceChangeScanner subcribing notifier=org.drools.io.impl.ResourceChangeNotifierImpl@296f25a7 to resource=[ClassPathResource path='com/abclegal/rules/resources/venue.pkg']

[2011:06:165 10:06:416:debug] KnowledgeAgent rebuilding KnowledgeBase using ChangeSet

[2011:06:165 10:06:556:exception]

java.lang.RuntimeException: KnowledgeAgent exception while trying to deserialize KnowledgeDefinitionsPackage 

        at org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:664)

        at org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:889)

        at org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:704)

        at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:584)

        at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:185)

        at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:168)

        at com.abclegal.rules.RulesUtilities.createKnowledgeBaseUsingAgent(RulesUtilities.java:91)

        at com.abclegal.rules.RulesBenchmarks.benchmarkVenueSelection(RulesBenchmarks.java:39)

        at com.abclegal.rules.RulesBenchmarks.main(RulesBenchmarks.java:33)

Caused by: java.lang.ClassCastException: [B cannot be cast to org.drools.rule.DialectRuntimeRegistry

        at org.drools.rule.Package.readExternal(Package.java:197)

        at org.drools.definitions.impl.KnowledgePackageImp.readExternal(KnowledgePackageImp.java:115)

        at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1791)

        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1750)

        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)

        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)

        at java.util.ArrayList.readObject(ArrayList.java:593)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:597)

        at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)

        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)

        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)

        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)

        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)

        at org.drools.core.util.DroolsStreamUtils.streamIn(DroolsStreamUtils.java:205)

        at org.drools.core.util.DroolsStreamUtils.streamIn(DroolsStreamUtils.java:174)

        at org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:653)

        ... 8 more

[2011:06:165 10:06:856:debug] KnowledgeAgent obtaining pkg resource=[ClassPathResource path='com/abclegal/rules/resources/venue.pkg']

[2011:06:165 10:06:856:exception]

java.lang.RuntimeException: KnowledgeAgent exception while trying to deserialize KnowledgeDefinitionsPackage 

        at org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:914)

        at org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:704)

        at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:584)

        at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:185)

        at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:168)

        at com.abclegal.rules.RulesUtilities.createKnowledgeBaseUsingAgent(RulesUtilities.java:91)

        at com.abclegal.rules.RulesBenchmarks.benchmarkVenueSelection(RulesBenchmarks.java:39)

        at com.abclegal.rules.RulesBenchmarks.main(RulesBenchmarks.java:33)

Caused by: java.lang.NullPointerException

        at org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:906)

        ... 7 more

[2011:06:165 10:06:865:info] KnowledgeAgent new KnowledgeBase now built and in use

[2011:06:165 10:06:865:debug] KnowledgeAgent finished rebuilding KnowledgeBase using ChangeSet