I have an app that runs fine in WSAD (WebSphere) or when I call the main class file in DOS. The jar creates fine but I get a runtime exception "unable to load DB2 driver" when it runs. All the db2 class files are contained in a zip file. I have seen many examples showing how to place Class-Path: in the manifest but they all seem to show references to another jar file. Is is possible to refer to other class files in a zip file? Would the class path reference the location of the zip file or a location in the project? Any help would be appreciated.