Hello Anders,
Could you share some more information on this issue?
The same problem(error 205) has occurred to me when trying to run Tobii REX on Ubuntu 14.04.
Just like in this discussion, I downgraded the REX firmware to support USB TCP/IP, but “ifconfig -a” showed the device as usb0 with the inappropriate IP address 172.28.195.2.
Also, I ran “./fwupgrade –auto –info-only” but there was the same problem again (error 205).