My solution writes simultaneous to a file and console as excpected. But there are for every write method a error message like that: "Achte darauf, dass die Methode write(String str) throws IOException der FileConsoleWriter-Klasse die Daten auch auf die Konsole schreibt." I don't know what's wrong. Perhaps it belongs to that: "Die FileConsoleWriter-Klasse muss das Feld private clFileWriter fileWriter besitzen." What is meant with the object-type clFileWriter with the name fileWriter? I used as object-type FileWriter. Thank's for helping.