Something quite weird is firing a bug in my code
(only executing under Windows !!!) where before it all went right.
Besides, Exception (see bellow) says:
"..refers to an unmapped class: com.interfaz.ContainerInterfaz.." which is
the interface implemented by Container and not a class at all even to be referred at
any mapping at all (hibernate surfed my hierarchy and got me into troubles).

Details below:
-----------------
Hibernate version: 3.2.5GA

Mapping documents:
<hibernate-mapping>
<class name="com.impl.Container"
table="CONTAINERS">
<id name="id" column="CONTAINER_ID">
<generator class="native"/>
</id>
<property name="date" type="timestamp" column="CREATION_DATE"/>

<set name="names" table="CONTAINER_NAMES">
<key column="CONTAINER_ID"/>
<element column="name" unique="true"
not-null="true" type="string"/>
</set>

<set name="versions" fetch="join"
lazy="false" order-by="VERSION_DATE" inverse="true">
<key column="CONTAINER_ID"/>
<one-to-many
class="com.impl.ContainerVersion"/>
</set>
</class>
</hibernate-mapping>

<hibernate-mapping>
<class name="com.impl.ContainerVersion"
table="CONTAINER_VERSIONS">

<id name="id" column="VERSION_ID">
<generator class="native"/>
</id>
<property name="date" type="timestamp" column="VERSION_DATE"/>

<property name="xml" type="text"
not-null="true" column="CONTENT" lazy="false"/>

<property name="mainVersion" type="boolean" not-null="true"/>


<many-to-one name="container" column="CONTAINER_ID" not-null="true"/>
</class>
</hibernate-mapping>

Code between sessionFactory.openSession() and session.close():
N/A (happens right at the beggining at creation of tables)

Full stack trace of any exception that occurs:
INFO: Mapping collection: com.impl.Container.versions
-> CONTAINER_VERSIONS
Exception uncaught in thread main
org.hibernate.MappingException: An association from the table CONTAINER_VERSIONS refers to an unmapped class: com.interfaz.ContainerInterfaz
at org.hibernate.cfg.Configuration.secondPassCompileForeignKeys(Configur
ation.java:1134)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:
1052)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.jav
a:1168)


Name and version of the database you are using:
hsqldb 1.8.0

u should specify atribute class :

<many-to-one name="container" class="com.impl.Container" column="CONTAINER_ID" not-null="true"/>

Ok, tnx a lot, it worked, but i still don't understand why before it worked (even now it did on Linux) without that class attribute and now it did not. Has it something to do with hibbernate
fixing bugs/holes ?