Hi folks, I did a new installation this morning. None of the clients is booting and I get an error that a file could not be found. I had a closer look at the following file: /srv/tftp/ltsp/ltsp.ipxe At the end of the file I found the following two entries: initrd /ltsp/ltsp.img initrd /ltsp/${img}/initrd.img I commented the first entry, which fixed the issue. Kind regards, Roman