Web Dynpro SessionExpiredLongJumpException

Hello!

I have a simple web dynpro that I am using in a GP. It contacts a backend SAP R/3 system to retrieve details of a material based on a number that a user enters.

Whenever I initiate the WD, I get the following exception -

Processing HTTP request to servlet [dispatcher] finished with error.

The error is: com.sap.tc.webdynpro.clientserver.session.SessionExpiredLongJumpException: Application session has expired. Please restart the application.

Exception id: [0015F21BC652005A0000294A000015EC00042998D0341A5E]

How could the application expire when I just start it? I checked it again by starting the application and looking in the logs, the error is produced right when I initiate the application.

Any ideas why?

Sameer