JVM and WSAD

friends
i am trying to run a program to test out my project(s) the main class has no compile errors as such but never runs and fails with the following message
java.lang.NoClassDefFoundError: com/companyname/testdriver/services/TestClass
Exception in thread "main"
However if I have a main class in someother project of the same workspace it works fine. can some one throw some light on why this behaviour?
Thanks in advance
Sriram

never mind i have resolved the issue seems to be that WSAD was giving mis-information and hence the problem.

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