NetBeans Formulá de Amostra Mestre/Detalhe

Estou montando uma pequena aplicação no Netbeans, com CRUD simples, mas quando monto o formulário de amostra mestre/detalhe ele simplismente não executa, aparece um erro sinistro.
Se alguem poder me ajudar, ficarei extremamente grato

SEGUE O ERRO

Exception in thread “AWT-EventQueue-0” javax.persistence.PersistenceException: No Persistence provider for EntityManager named aut_comPU: Provider named oracle.toplink.essentials.PersistenceProvider threw unexpected exception at create EntityManagerFactory:
oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Local Exception Stack:
Exception [TOPLINK-30005] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: sun.misc.Launcher$AppClassLoader@11b86e7
Internal Exception: javax.persistence.PersistenceException: Exception [TOPLINK-28018] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EntityManagerSetupException
Exception Description: predeploy for PersistenceUnit [aut_comPU] failed.
Internal Exception: Exception [TOPLINK-30007] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while loading class: autcom.Fornecedor to check whether it implements @Entity, @Embeddable, or @MappedSuperclass.
Internal Exception: java.lang.ClassNotFoundException: autcom.Fornecedor
at oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources(PersistenceUnitLoadingException.java:143)
at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createEntityManagerFactory(EntityManagerFactoryProvider.java:169)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:110)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
at autcom.frente_de_caixa.ViewFornecedor.initComponents(ViewFornecedor.java:30)
at autcom.frente_de_caixa.ViewFornecedor.(ViewFornecedor.java:14)
at autcom.frente_de_caixa.ViewFornecedor$1.run(ViewFornecedor.java:551)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: javax.persistence.PersistenceException: Exception [TOPLINK-28018] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EntityManagerSetupException
Exception Description: predeploy for PersistenceUnit [aut_comPU] failed.
Internal Exception: Exception [TOPLINK-30007] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while loading class: autcom.Fornecedor to check whether it implements @Entity, @Embeddable, or @MappedSuperclass.
Internal Exception: java.lang.ClassNotFoundException: autcom.Fornecedor
at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:643)
at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.callPredeploy(JavaSECMPInitializer.java:171)
at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initPersistenceUnits(JavaSECMPInitializer.java:239)
at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initialize(JavaSECMPInitializer.java:255)
at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createEntityManagerFactory(EntityManagerFactoryProvider.java:155)
… 13 more
Caused by: Exception [TOPLINK-28018] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EntityManagerSetupException
Exception Description: predeploy for PersistenceUnit [aut_comPU] failed.
Internal Exception: Exception [TOPLINK-30007] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while loading class: autcom.Fornecedor to check whether it implements @Entity, @Embeddable, or @MappedSuperclass.
Internal Exception: java.lang.ClassNotFoundException: autcom.Fornecedor
at oracle.toplink.essentials.exceptions.EntityManagerSetupException.predeployFailed(EntityManagerSetupException.java:228)
… 18 more
Caused by: Exception [TOPLINK-30007] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while loading class: autcom.Fornecedor to check whether it implements @Entity, @Embeddable, or @MappedSuperclass.
Internal Exception: java.lang.ClassNotFoundException: autcom.Fornecedor
at oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException.exceptionLoadingClassWhileLookingForAnnotations(PersistenceUnitLoadingException.java:160)
at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.isEntity(PersistenceUnitProcessor.java:319)
at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProcessor.buildEntityClassSetFromAnnotations(MetadataProcessor.java:491)
at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProcessor.buildEntityList(MetadataProcessor.java:462)
at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.processORMetadata(PersistenceUnitProcessor.java:366)
at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:607)
… 17 more
Caused by: java.lang.ClassNotFoundException: autcom.Fornecedor
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.isEntity(PersistenceUnitProcessor.java:316)
… 21 more

The following providers:
oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider
Returned null to createEntityManagerFactory.

    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:154)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
    at autcom.frente_de_caixa.ViewFornecedor.initComponents(ViewFornecedor.java:30)
    at autcom.frente_de_caixa.ViewFornecedor.<init>(ViewFornecedor.java:14)
    at autcom.frente_de_caixa.ViewFornecedor$1.run(ViewFornecedor.java:551)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

O erro está na sua persistência com o banco de dados.

Amigo, segue meu persistence.XML

<?xml version="1.0" encoding="UTF-8"?> oracle.toplink.essentials.PersistenceProvider autcom.Fornecedor

não consigo encontrar nada de errado nele
ME ajudem. PLEASE

Aparentemente ele está certo.
Mas verifica se vc consegue entrar com essas informações.

Parece que foi erro em alguma anotação.
Existe alguma classe com esse nome aut_comPU

n: No Persistence provider for EntityManager named aut_comPU: Provider named