QuerySyntaxException class is not mapped

[kennethrene]

Hi,

I have a jar file (acad.jar) than contain TemaIcfes Entity:

package co.academico.entidades;

import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.GeneratedValue;

import org.jboss.seam.annotations.Name;

@Entity
@Name("TemaIcfes")
@Table(name = "temas_icfes")
public class TemaIcfes implements Serializable{

@Id
@GeneratedValue
private short tema;
private String descripcion_tema;

public short getTema(){
return tema;
}

public void setTema(short tema){
this.tema = tema;
}

public String getDescripcion_tema(){
return descripcion_tema;
}

public void setDescripcion_tema(String descripcion_tema){
this.descripcion_tema = descripcion_tema;
}
}


The problem is that when I use it in another application through an EJB shows the following error:

Exception during request processing: Caused by javax.el.ELException with message: "javax.ejb.EJBTransactionRolledbackException: org.hibernate.hql.ast.QuerySyntaxException: TemaIcfes is not mapped [SELECT a FROM TemaIcfes a ORDER BY tema]"

Classes:

HacerMantenimiento.java:

package co.academico.admin;

import java.util.List;
import co.academico.entidades.TemaIcfes;
import javax.ejb.Local;

@Local
public interface HacerMantenimiento{

public void crear(TemaIcfes tema);
public List consultarTemaIcfes();
public void modificar(TemaIcfes tema);
public void listar();
public void eliminar(TemaIcfes tema);

public void destroy();
}

HacerMantenimientoEJB.java:

package co.academico.admin;

import static org.jboss.seam.ScopeType.SESSION;
import java.util.List;
import co.academico.entidades.TemaIcfes;
import org.jboss.seam.annotations.Destroy;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.annotations.datamodel.DataModel;
import javax.ejb.Remove;
import javax.ejb.Stateful;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

@Stateful
@Scope(SESSION)
@Name("hacerMantenimiento")
public class HacerMantenimientoEJB implements HacerMantenimientoTemaIcfes{

@PersistenceContext
private EntityManager em;

@DataModel
private List temasIcfes;

public void crear(TemaIcfes tema){
em.persist(tema);
}

public List consultarTemaIcfes(){
temasIcfes = em.createQuery
("SELECT a "+
"FROM TemaIcfes a "+
"ORDER BY tema").getResultList();
return temasIcfes;
}

public void modificar(TemaIcfes tema){
em.merge(tema);
em.flush();
}

public void listar(){}

public void eliminar(TemaIcfes tema){
em.remove(tema);
}

@Remove @Destroy
public void destroy(){}
}


home.xhtml:

<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:s="http://jboss.com/products/seam/taglib"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:rich="http://richfaces.org/rich"
template="layout/template.xhtml">

<ui:define name="body">

<h:messages globalOnly="true" styleClass="message"/>

<rich:panel>

<h:outputText
value="No existen temas registrados"
rendered="#{temasIcfes != null and temasIcfes.rowCount==0}"/>

<h:dataTable id="temasIcfes"
value="#{temasIcfes}"
var="tema"
rendered="#{temasIcfes.rowCount>0}"
style=" width : 377px;">

<h:column>
<f:facet name="header">Codigo</f:facet>
#{tema.tema}
</h:column>
<h:column>
<f:facet name="header">Descripcion</f:facet>
#{tema.descripcion_tema}
</h:column>
</h:dataTable>

</rich:panel>

</ui:define>
</ui:composition>

pages.xml:

...
<page view-id="/home.xhtml" action="#{hacerMantenimiento.consultarTemaIcfes}">


<redirect view-id="/main.xhtml"/>


...

What is the problem?
They could help to solve this problem please?