No Persistence provider for EntityManager named

Question

I have my persistence.xml with the same name using TopLink under the META-INF directory. Then, I have my code calling it with:

Answer 1

If there are different names in Persistence.createEntityManagerFactory("JPAService") in different classes than you get the error. By refactoring it is possible to get different names which was in my case. In one class the auto-generated Persistence.createEntityManagerFactory("JPAService")in private void initComponents(), ContactsTable class differed from Persistence.createEntityManagerFactory("JPAServiceExtended") in DBManager class.