Erro JPA

Assuntos Gerais
#1

Ao tentar utilizar uma namedquery ,tenho o seguinte erro:

javax.persistence.PersistenceException: org.hibernate.MappingException: Named query not known: findbyId
        at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:630)

Tenho a query definida:

@NamedQuery(name="findbyId",query="select i.isn_tab_code, "+
                                   "i.isn_lastisn "+
                                   "from isncontrol i "+
                                   "where i.isn_tab_code =:tabCode")
                                   
                                   
@Entity
public class IsnControl {

e o persistence.xml:

	<persistence-unit name="tax" transaction-type="RESOURCE_LOCAL">
	
		<class>bean.Tax</class>
                 <class>bean.IsnControl</class>

O que mais falta?

Grato

#2