Using
<
import org.hibernate.annotations.NamedQuery;
import org.hibernate.annotations.Table;

@Table(appliesTo="Datas_De")
@NamedQuery( name="selectInfosDe",query = "From Datas_De" )
public class Datas_De implements java.io.Serializable
>

A simple Query with
Query q = em.createQuery("selectInfosDe");
crashes
but a direct call with
Query q = em.createQuery("From Datas_De");
works perfect.

I think the annotation NamedQuery works not correct.