i got 3 tables named, address, lookup_code,state

CREATE TABLE `address` (
`OID` varchar(35) NOT NULL default '',
`ADDRESS_TYPE_OID` varchar(35) default NULL,
`ADDRESS_LINE_1` varchar(25) NOT NULL default '',
`ADDRESS_LINE_2` varchar(25) default NULL,
`STREET_TYPE_OID` varchar(35) default NULL,
`UNIT_NUMBER` varchar(15) default NULL,
`CITY` varchar(25) NOT NULL default '',
`STATE_OID` varchar(35) NOT NULL default '',
`ZIP` varchar(10) NOT NULL default '',
`CREATE_DTM` datetime NOT NULL default '0000-00-00 00:00:00',
`UPDATE_DTM` datetime NOT NULL default '0000-00-00 00:00:00',
`CREATED_BY` varchar(35) NOT NULL default '',
`UPDATED_BY` varchar(35) NOT NULL default '',
PRIMARY KEY (`OID`),
UNIQUE KEY `XPKADDRESS` (`OID`),
KEY `XIF89ADDRESS` (`ADDRESS_TYPE_OID`),
KEY `XIF90ADDRESS` (`STREET_TYPE_OID`),
KEY `XIF91ADDRESS` (`STATE_OID`),
CONSTRAINT `0_222` FOREIGN KEY (`STATE_OID`) REFERENCES `state` (`OID`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `0_224` FOREIGN KEY (`STREET_TYPE_OID`) REFERENCES `lookup_code` (`OID`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `0_226` FOREIGN KEY (`ADDRESS_TYPE_OID`) REFERENCES `lookup_code` (`OID`) ON DELETE NO ACTION ON UPDATE NO ACTION
) TYPE=InnoDB;





CREATE TABLE `lookup_code` (
`OID` varchar(35) NOT NULL default '',
`TYPE` varchar(15) NOT NULL default '',
`LABEL` varchar(255) NOT NULL default '',
`WEIGHT` int(11) default NULL,
`VALUE` float default NULL,
PRIMARY KEY (`OID`),
UNIQUE KEY `XPKLOOKUP_CODE` (`OID`)
) TYPE=InnoDB;




CREATE TABLE `state` (
`OID` varchar(35) NOT NULL default '',
`STATE_CD` char(2) NOT NULL default '',
`STATE_NAME` varchar(35) NOT NULL default '',
`CREATE_DTM` datetime NOT NULL default '0000-00-00 00:00:00',
`UPDATE_DTM` datetime NOT NULL default '0000-00-00 00:00:00',
`CREATED_BY` varchar(35) NOT NULL default '',
`UPDATED_BY` varchar(35) NOT NULL default '',
PRIMARY KEY (`OID`),
UNIQUE KEY `XPKSTATE` (`OID`)
) TYPE=InnoDB;


and here are my hbm files
AddressVO.hbm.xml



<hibernate-mapping package="com.aib.vo" >


<class name="AddressVO" table="address" not-null="true" lazy="true" >
<id name="oid"column="OID" >
<generator class="assigned" />
</id>

<property name="addressTypeOid" column="ADDRESS_TYPE_OID" length="35" />
<property name="addressLine1" column="ADDRESS_LINE_1" not-null="true" length="25" />
<property name="addressLine2" column="ADDRESS_LINE_2" length="25" />
<property name="streetTypeOid" column="STREET_TYPE_OID" length="35" />
<property name="unitNumber" column="UNIT_NUMBER" length="15" />
<property name="city" column="CITY" not-null="true" length="25" />
<property name="stateOid" column="STATE_OID" not-null="true" length="35" />
<property name="zip" column="ZIP" not-null="true" length="10" />
<property name="createDtm" column="CREATE_DTM" not-null="true" length="19" />
<property name="updateDtm" column="UPDATE_DTM" not-null="true" length="19" />
<property name="createdBy" column="CREATED_BY" not-null="true" length="35" />
<property name="updatedBy" column="UPDATED_BY" not-null="true" length="35" />


<many-to-one name="lookup" column="OID" not-null="true"/>
<many-to-one name="state" column="OID" not-null="true"/>


</class>
</hibernate-mapping>



LookupBeanhbm.xml

<hibernate-mapping>
<class name="com.aib.vo.LookupCodeBean" table="lookup_code">
<id name="oid" type="string" column="OID" length="32">
<generator class="assigned"/>
</id>
<property name="label" column="TYPE" length="15" not-null="true"/>
<property name="type" column="LABEL" length="255" not-null="true"/>
<property name="weight" column="WEIGHT" length="11" not-null="false"/>
<property name="value" column="VALUE" length="12" not-null="false"/>
<!-- associations -->
<!--<set name="address" lazy="true" inverse="true" table="Address" >
<key column="OID"/>
<one-to-many class="com.aib.vo.AddressVO"/>
</set>-->
</class>
</hibernate-mapping>


StateVO.hbm.xml



<hibernate-mapping>

<class name="com.aib.vo.StateVO" table="STATE" lazy="true">

<id name="oid" type="string" column="OID" >
<generator class="assigned" />
</id>

<property name="stateCd" column="STATE_CD" not-null="true" length="2" />

<property name="stateName" column="STATE_NAME" not-null="true" length="35" />

<property name="createDtm" column="CREATE_DTM" not-null="true" length="19" />

<property name="updateDtm" column="UPDATE_DTM" not-null="true" length="19" />

<property name="createdBy" column="CREATED_BY" not-null="true" length="35" />

<property name="updatedBy" column="UPDATED_BY" not-null="true" length="35" />

<!-- associations -->

<set name="address" lazy="true" inverse="true">
<key column="OID"/>
<one-to-many class="com.aib.vo.AddressVO"/>
</set>




</class>
</hibernate-mapping>






when i am trying to execute , i'm getting this particular erro.

net.sf.hibernate.MappingException: Association references unmapped class: com.aib.vo.AddressVO

can some one point ,where exactly the problem is .

Thanks in advance

Fully qualify the class name

changed to fully qualified name, still getting the same error

Your Hibernate.cfg.xml refer the 2 files ?

Thanks Emanuel, it worked, i was defining miltiple x.hbm.xml in hibernate-cfg.xml.