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I am new to programming EJB. I gotta figure out why I am getting the error. The following link contains the entire project, the error message (server.log) and the instructions of the project (in spanish). The pdf file has a sql script to create the database in PostGreSQL https://drive.google.com/open?id=0ByDcdmGZJObUMFVtaEQ2ZnduNUU

I basically need to be able to insert a new user (cuidadano) that lives in a city(cuidad) and provincia(province). When selecting the province, the second drop down should only show the cities under the province. I am using "wildfly-8.1.0.Final" is my application server program.

I need to get this right asap for a class i am taking. My final grade depends on it. thanks!

Andres Toro
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  • You should post your code here and read [mcve]. – Geinmachi Jun 05 '16 at 18:59
  • I forgot to mention i have reviewed other answers but havent helped me. I know it is not a problem of connection to the database because from the wildfly administration panel i am testing the data source connection and it working. i get a "Successfully created JDBC connection" – Andres Toro Jun 05 '16 at 19:08

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In your server.log there is 

Caused by: org.hibernate.AnnotationException: Use of @OneToMany or @ManyToMany targeting an unmapped class: com.ejb.entidades.Provincia.ciudades[com.ejb.entidades.Ciudad]

Try analyzing the class Ciudad and the annotation you used there, expecially @OneToMany and @ManyToMany with reference to classes that are not managed (not marked as Entity or with other JPA annotations)

Wallkan
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