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web dynpro preview: NoSuchMethodError


I am trying to deploy certain Web Dynpros contained in a portal business package for ESS (ess, pcui_gp). The System I am using is a Sneak Preview Java WAS 6.40, EP6.0, SP16. The deployment process as such seems to have worked correctly as the WD Content Admin shows me a complete list of all the packages under 'Deployed Content ->' with status 'green'.

However am facing the following problem when trying to run the preview of a package, say '':

The initial exception that caused the request to fail, was:

    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)...

Unfortunately I am not yet familiar with Web Dynpro development, but I read that NoSuchMethod errors are usually due to version mismatchs. However the two packages in question - ess11p_4 and pcui_gp010p_1 - are the newest available and according to note 761266 they should fit to J2EE stacks with SP16 ?!

It'd be great if someone could share some insights on this.



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