I ran into a strange problem while trying to deliever a java application. I stored all my application into a jar and added a correct manifest file (created with eclipse). When I try to start the application with a double click everything works fine on my system, the application is launched as expected. The problem is when I copy the jar file ( it is really exactly the same jar) to another system and try to launch it with a double click I get the error: "Could not find the main class. Program will exit.". The file type jar is associated with javaw and java is properly installed on both systems. Has anybody an idea why the same jar file migth launch on one system but fail to find the main class on another???