Hi, Error-handling: On the on hand if you call a method of an object which has a return value you simple use message_send_with_reply_and_block, you pass a DBusError variable. Then you check the arguments if the returned message, if it fails an error has ocured and you can output the error since you have passed it before. But how can such an error-handling be achieved when you invoke a message without a return value by using message_send ? There is no error variable which gets passed!? And: Using message_send_with_reply_and_block, makes only sense if the called method has a return value, right? A method with void as return should be called with message_send? thanks so far... -- Regards, --Codefritz