I am getting the following error when executing:

new NHibernate.Tool.hbm2ddl.SchemaExport(cfg).Create(true, true);

Could not configure datastore from input stream
System.Xml.Schema.XmlSchemaValidationException: The element 'class' in namespace 'urn:nhibernate-mapping-2.0' has invalid child element 'property' in namespace 'urn:nhibernate-mapping-2.0'. List of possible elements expected: 'urn:nhibernate-mapping-2.0:meta urn:nhibernate-mapping-2.0:jcs-cache urn:nhibernate-mapping-2.0:cache urn:nhibernate-mapping-2.0:id urn:nhibernate-mapping-2.0:composite-id'.

Any help, would be appreciated, thanks.

Mardo

It looks like one of your mapping doesn't contain an id element...
You may validate them against the mapping schema (.xsd) to find it or simple look at them one by one.

Note that the id must come before properties.