Thank you, mimisiku for the reply!
Despite of buying a new box, is there a way to repair the /usr directory on the usb stick in order to continue to use the box as before?
This has happened since I planed a record to be started late night on a shared hdd drive on another (dreambox) receiver, but it was not accessible, as of lan issue.
What device would you recommend me in order to further use smart cards and oscam scripts - Vu+ 4k?