Class file has wrong version

Description
When running generated code the following error is reported:
class file has wrong version xx.x, should be xx.x

The Problem
The Runtime Library LtXmlLib20.jar is built with JDK 1.5 but the generated code has been built using an older JDK.

The Solution
The supported Java platform if JDK 1.5. The generated code is for JDK 1.5 only, so to fix the problem you need to build the generated code using JDK 1.5.