In any other case you may simply miss a single line you don't need and get the result which DrStrangeprk mentioned. all courses and interfaces while in the superclass hierarchy (e.g. see Java course is present in classpath but startup fails with Mistake: Could not find or load main class) https://byd81469.loginblogin.com/41105913/a-secret-weapon-for-uninterruptible-power-supply-symbol