Hibernate version: 3.0.5

Mapping documents:
<any name="owner" id-type="long" meta-type="string" node="owner">
<meta-value value="person.Customer" class="person.Customer"/>
<meta-value value="person.Supplier" class="person.Supplier"/>
<meta-value value="person.Manufacturer" class="person.Manufacturer"/>

<column name="ref_owner_type" not-null="true" />
<column name="ref_owner_id" not-null="true" />
</any>

</joined-subclass>
Code between sessionFactory.openSession() and session.close():
Session dom4JSession = service.getDom4JSession();

service.getTransaction();

String outputpath=getOutputFolder();
for (String entity : entities){
Criteria criteria = dom4JSession.createCriteria(entity);
criteria.setLockMode(LockMode.READ);
List<AbstractElement> result = criteria.list();
.....
dom4JSession.commit();
dom4JSession.close();

Full stack trace of any exception that occurs:
java.lang.UnsupportedOperationException: any types cannot be stringified
at org.hibernate.type.AnyType.setToXMLNode(AnyType.java:151)
at org.hibernate.property.Dom4jAccessor$ElementSetter.set(Dom4jAccessor.java:307)
at org.hibernate.tuple.AbstractTuplizer.setPropertyValues(AbstractTuplizer.java:207)
at org.hibernate.persister.entity.BasicEntityPersister.setPropertyValues(BasicEntityPersister.java:2875)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:113)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:530)
at org.hibernate.loader.Loader.doQuery(Loader.java:436)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:218)
at org.hibernate.loader.Loader.loadCollection(Loader.java:1434)
at org.hibernate.loader.collection.OneToManyLoader.initialize(OneToManyLoader.java:111)
at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:488)
at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)
at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1431)
at org.hibernate.type.CollectionType.getCollection(CollectionType.java:484)
at org.hibernate.type.CollectionType.resolveKey(CollectionType.java:333)
at org.hibernate.type.CollectionType.resolve(CollectionType.java:326)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:105)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:530)
at org.hibernate.loader.Loader.doQuery(Loader.java:436)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:218)
at org.hibernate.loader.Loader.doList(Loader.java:1593)
at org.hibernate.loader.Loader.list(Loader.java:1577)
at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:111)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1322)
at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:300)
at de.innuce.allinitializer.dataexport.Exporter.main(Exporter.java:46)
Name and version of the database you are using: Postgres 8

The generated SQL (show_sql=true):
Hibernate: select customer0_.pk_personrole as id0_, customer0_1_.version as version45_0_, customer0_1_.changePerson as changePe3_45_0_, customer0_1_.changeDate as changeDate45_0_, customer0_1_.email as email45_0_, customer0_1_.internetUrl as internet6_45_0_, customer0_1_.partner_id as partner7_45_0_, customer0_.contactstate as contacts2_47_0_, customer0_.ref_parent_type as ref3_47_0_, customer0_.ref_parent as ref4_47_0_ from Customer customer0_ inner join role customer0_1_ on customer0_.pk_personrole=customer0_1_.id where customer0_.pk_personrole=?
Hibernate: select addresses0_.role_id as role14_1_, addresses0_.id as id1_, addresses0_.id as id0_, addresses0_.version as version41_0_, addresses0_.changePerson as changePe4_41_0_, addresses0_.changeDate as changeDate41_0_, addresses0_.type as type41_0_, addresses0_.addressType as addressT7_41_0_, addresses0_.deviantName1 as deviantN8_41_0_, addresses0_.deviantName2 as deviantN9_41_0_, addresses0_.line1 as line10_41_0_, addresses0_.line2 as line11_41_0_, addresses0_.line3 as line12_41_0_, addresses0_.line4 as line13_41_0_, addresses0_.role_id as role14_41_0_, addresses0_.isoCountryCode as isoCoun15_41_0_, addresses0_.subclass as subclass0_ from address addresses0_ where addresses0_.role_id=? order by addresses0_.addressType
Hibernate: select phones0_.role_id as role5_1_, phones0_.id as id1_, phones0_.id as id0_, phones0_.version as version56_0_, phones0_.numba as numba56_0_, phones0_.type as type56_0_ from phone phones0_ where phones0_.role_id=?
Hibernate: select bankaccoun0_.role_id as role10_1_, bankaccoun0_.id as id1_, bankaccoun0_.id as id0_, bankaccoun0_.version as version57_0_, bankaccoun0_.changePerson as changePe4_57_0_, bankaccoun0_.changeDate as changeDate57_0_, bankaccoun0_.bankname as bankname57_0_, bankaccoun0_.bankIdentifier as bankIden7_57_0_, bankaccoun0_.accountIdentifier as accountI8_57_0_, bankaccoun0_.validTilDate as validTil9_57_0_, bankaccoun0_.subclass as subclass0_ from bankaccount bankaccoun0_ where bankaccoun0_.role_id=?
Debug level Hibernate log excerpt:

I use DOM4J Entity Model to export data. When I have some "any-mapped" classes, the error above occurs. Any ideas what I am doing wrong?