Hi Yugandhar,
a) Did you maintain proper Salesforce user credentials in Java lookup class !!
a) Have you maintained the SOAP look-up channel adapter module parametersImage may be NSFW.
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2) Try to test your Operation Mapping with Trace level all, Check the log.
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3) Using XPI inspector run the Interface and check detailed audit log of SOAP lookup channel.
Regards
RK N
