I have a little problem with that exception:
> Exception in thread "main" javax.persistence.PersistenceException: No
> Persistence provider for EntityManager named Service: The following
> providers:
> oracle.toplink.essentials.PersistenceProvider
> oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider
> Returned null to createEntityManagerFactory.
>
> i will be appreciated you if you can help me
> attentively
> damaris
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