Dear all, I intend to test jPSKmail-2.0.24 alpha test version, but I get a lot of error-messages: admin@desktop_lmde_32bit ~ $ sudo java -jar jPSKmail-2.0.24.jar [sudo] password for admin: Configuration.xml jPSKmail ends here... Exception in thread "main" java.lang.NoClassDefFoundError: gnu/io/SerialPortEventListener at javapskmail.Main.handlegps(Main.java:1935) at javapskmail.Main.main(Main.java:373) Caused by: java.lang.ClassNotFoundException: gnu.io.SerialPortEventListener at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) ... 2 more My Java-version: admin@desktop_lmde_32bit ~ $ java -version java version "1.6.0_26" Java(TM) SE Runtime Environment (build 1.6.0_26-b03) Java HotSpot(TM) Client VM (build 20.1-b02, mixed mode, sharing) Is there any manual, how to install? tnx, vy 73 and merry christmas Franz, oe5rtl