I executed the following command:

java net.sf.hibernate.tool.hbm2ddl.SchemaExport --output=cat.ddl --text hibernate.cfg.xml

and no error appears. I have the "Cat.hbm.xml" file in the same directory.
It keeps creating the "cat.ddl" file but with nothing in it (zero length). Is he reading the "mapping" section?
Please help.

Here's my hibernate.cfg.xml:

<?xml version='1.0'?>

<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-2.0.dtd">

<hibernate-configuration>

<session-factory>

<property name="show_sql">false</property>

<mapping resource="Cat.hbm.xml"/>

</session-factory>

</hibernate-configuration>