As technology advances, particularly in the area of Java components, new WebSphere Application Server product versions advance to support and extend the most recent open specification levels. If your existing applications currently support different specification levels than are supported by WebSphere Application Server - Express, it is likely you need to update at least a few aspects of the applications to comply with the new specifications.
See these topics for instructions on how to migrate your applications:
Application assembly in WebSphere Application Server - Express
This topic describes the changes in application assembly in WebSphere Application Server - Express.Migrate Web applications
This topic describes how to determine what, if any, migration changes are required for your Web applications.Migrate HTTP sessions
This topic describes how to determine what, if any, migration changes are required for your HTTP sessions.Migrate from wscp to wsadmin
This topic describes how to determine what migration changes are required for your wscp commands.