Hibernate version: 3

Full stack trace of any exception that occurs:java.lang.NoClassDefFoundError: org/apache/commons/collections/SequencedHashMap
at org.hibernate.mapping.Table.<init>(Table.java:33)
at org.hibernate.cfg.Mappings.addTable(Mappings.java:116)
at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:250)
at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:235)
at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:151)
at org.hibernate.cfg.Configuration.add(Configuration.java:360)
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:397)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:446)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1313)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1285)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1267)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1234)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1162)
at org.hibernate.cfg.Configuration.configure

I have the following directory structure:

src\prg1

src contains:
prg1 <folder>
prg2 <folder>
hibernate.cfg.xml

hibernate.cfg.xml :

<mapping resource="prg1/tst1.hbm.xml"/>
<mapping resource="prg2/tst2.hbm.xml"/>

prg1:
tst1.java
tst1.hbm.xml

prg2:
tst2.java
tst2.hbm.xml


SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory(); throws the exception: org/apache/commons/collections/SequencedHashMap

I believe it is because hibernate not being able to locate the appropriate mapping file? Everything seems okie, to me. Can neone comment on the same ...
Thanks and regards,
Saurabh

The Commons collection jar is not part of your classpath