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

I faced the same problem, but on EclipseLink version 2.5.0.

I solved my problem by adding yet another jar file which was necessarily (javax.persistence_2.1.0.v201304241213.jar.jar);

Jars needed:
- javax.persistence_2.1.0.v201304241213.jar
- eclipselink.jar
- jdbc.jar (depending on the database used).

I hope this helps.