The printer is connected to a USR-Router via USB and the URI is: http://<IP-Adress>:1631/printers/my_printer Yes, it is port 1631! It's fix value by USR. Until 1.1.xx everything was ok, but since 1.2. it isn't possible to let cups take the non-standard value 1631. What can I do? Regards, Elmar Version 1.2.12