I have a Usrgsm class and a Suscrb class with a many-to-one association.
When I want to load the Suscrb entity, I want to load all the properties without the Usrgsm associated with the many-to-one relationship. I have used the three option for the lazy option in the many-to-one tag (lazy=proxy, lazy=no-proxy and lazy=false) but the Usrgsm is always loaded.

Here are the mapping files. I use Hibernate 3.1.

<hibernate-mapping package="com.cwsoft.model.businessobject">

<class name="Suscrb" table="SUSCRB" lazy="false">
<id name="id" column="ID" type="long">
<generator class="assigned"/>
</id>
<many-to-one name="usrgsm" column="ID_UG" class="Usrgsm" lazy="proxy"/>
<property name="refmaj" column="REFMAJ" type="string"/>
<property name="susnum" column="SUSNUM" type="long"/>
<property name="operator" column="OPERATOR" type="string"/>
</class>

</hibernate-mapping>

<hibernate-mapping package="com.cwsoft.model.businessobject">

<class name="Usrgsm" table="USRGSM" lazy="false">
<id name="id" column="ID" type="long">
<generator class="assigned"/>
</id>
<property name="datcrt" column="DATCRT" type="string" />
<property name="name" column="NAME" type="string" />
<property name="firstname" column="FIRSTNAME" type="string" />
</class>

</hibernate-mapping>

Try to remove the lazy="false" attribute to your Suscrb class. As far as I can remember, non lazy classes can't use lazy many-to-one (no CGLIB instrumentation).