Struts 2 fiter problem - could not be initialized java.lang.NoClassDefFoundError

When I start up my struts 2 application I'm getting this error:
[Servlet Error]-[Filter [struts2]: could not be initialized]: java.lang.NoClassDefFoundError:

The BaseAction class is in a jar file containing the whole framework I am working with.  What could be the cure for this runtime error?
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Murali MurugesanConnect With a Mentor Full stack Java developerCommented:
check whether your jar is there in the classpath.
jwright9Author Commented:
The jar is in the path.  I added it to the exports tab in the buid path of RAD.
jwright9Author Commented:
Short answer = short utility
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