Solved
Sujata,
Do you have a valid support account, and can you view this article? CS139386.
If the steps in the article don't resolve it, are you using 32-bit browser on the 64-bit machine? Perhaps try using only 32-bit java install. And as always, make sure you're using the proper java version that is supported for your version of Windchill. Refer to the software matricies.

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