java - Unable to load class declared as < mapping class="Package.Class" /> in the configuration -

hibernate.cfg.xml

    ?xml version="1.0" encoding="utf-8"?>         <!doctype hibernate-configuration public "-//hibernate/hibernate configuration dtd 3.0//en" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">         <hibernate-configuration>           <session-factory>             <property name="hibernate.dialect">org.hibernate.dialect.mysqldialect</property>             <property name="hibernate.connection.driver_class">com.mysql.jdbc.driver</property>               <property name="hibernate.connection.charset">utf8</property>             <property name="hibernate.connection.characterencoding">utf8</property>             <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/usosurvey</property>             <property name="hibernate.connection.username">usosurvey</property>             <property name="hibernate.connection.password">usosurvey</property>             <property name="hibernate.hbm2ddl.auto">update</property>             <property name="hibernate.show_sql">true</property>              <property name="hbm2ddl.auto">update</property>                <property name="hibernate.transaction.factory_class">org.hibernate.transaction.jdbctransactionfactory</property>             <property name="hibernate.current_session_context_class">thread</property>               <!-- configuration pool via c3p0-->              <property name="c3p0.acquire_increment">1</property>              <property name="c3p0.idle_test_period">100</property> <!-- seconds -->              <property name="c3p0.max_size">10</property>              <property name="c3p0.max_statements">0</property>              <property name="c3p0.min_size">1</property>              <property name="c3p0.timeout">100</property> <!-- seconds -->              <mapping class="modelo.grpusuario"/>             <mapping class="modelo.menu"/>             <mapping class="modelo.encuesta"/> ... 

in ireport tools->options->ireport->classpath

c:\users\administrador\documents\netbeansprojects\usosurvey\src\java\util -> i*n folder mapping class*

c:\users\administrador\documents\netbeansprojects\usosurvey\src\java\modelo -> in folder model classes

grpusuario.java

/*  * change template, choose tools | templates  * , open template in editor.  */ package modelo;  import java.io.serializable; import java.util.collection; import javax.persistence.*; import javax.validation.constraints.notnull; import javax.validation.constraints.size; import javax.xml.bind.annotation.xmlrootelement; import javax.xml.bind.annotation.xmltransient;  /**  *  * @author administrador  */ @entity @table(name = "grpusuarios", catalog = "usosurvey", schema = "") @xmlrootelement @namedqueries({     @namedquery(name = "grpusuario.findall", query = "select g grpusuario g"),     @namedquery(name = "grpusuario.findbygrupo", query = "select g grpusuario g g.grupo = :grupo"),     @namedquery(name = "grpusuario.findbydescripcion", query = "select g grpusuario g g.descripcion = :descripcion")}) public class grpusuario implements serializable {     private static final long serialversionuid = 1l;     @id     @basic(optional = false)     @notnull     @column(name = "grupo")     private integer grupo;     @basic(optional = false)     @notnull     @size(min = 1, max = 64)     @column(name = "descripcion")     private string descripcion;     @onetomany(cascade = cascadetype.all, mappedby = "seclevel")     private collection<menu> menucollection;     @onetomany(cascade = cascadetype.all, mappedby = "grupo", orphanremoval = true)     private collection<usuario> usuariocollection;      public grpusuario() {     } .... 

but when trying create connection following error: unable load class declared < mapping class="modelo.grpusuario" /> in configuration