: java.lang.ClassNotFoundException: net.sf.cglib.proxy.Callback at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:000) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:000) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:000) at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:000) at java.lang.ClassLoader.loadClass(Unknown Source) 