PLEASE HELP ! This is my problem :

INFO: Mapping file: C:\dvlp\OutilsNew\Hibernate-2.0.3\bin\MappingGlobal.hbm.xml
15 sept. 2003 15:08:18 net.sf.hibernate.cfg.Configuration add
GRAVE: Could not compile the mapping document
java.lang.ClassNotFoundException: Personne
at java.net.URLClassLoader$1.run(URLClassLoader.java:198)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)


MYCONFIG FILE IS :

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd" >

<hibernate-mapping>

<class name="Personne" table="personnes">
<id name="id" type="int" column="id">
<generator class="assigned" />
</id>
<property name="nom" type="java.lang.String" column="nom" length="255"/>
<property name="prenom" type="java.lang.String" column="prenom" length="255"/>

<set name="Entreprises" table="Personnel_Entreprise" lazy="true">
<key>
<column name="personne_id" not-null="true" />
</key>
<many-to-many class="Entreprise">
<column name="entreprise" not-null="true"/>
</many-to-many>
</set>
</class>

<class name="Entreprise" table="entreprises">
<id name="id" type="int" column="id">
<generator class="assigned" />
</id>
<property name="raisonSociale" type="java.lang.String" column="nom" length="255"/>

<set name="Personnes" table="Personnel_Entreprise" lazy="true">
<key>
<column name="entreprise_id" not-null="true" />
</key>
<many-to-many class="Personne">
<column name="personne" not-null="true"/>
</many-to-many>
</set>

</class>

</hibernate-mapping>

Are you really putting your classes in the default package?
I would think your mapping should look more like:

<class name="com.yourcompany.project.Personne" table="personnes">

You must put the fully qualified class name in the mapping, not just the root.

thanks that's all good !