When printing to nearest from the HTML5 client, nearest throws a traceback, visible in cups debug output. > Traceback (most recent call last): > File "/usr/lib/cups/backend/nearest", line 108, in <module> > sys . exit ( ooO00oOoo ( ) ) > File "/usr/lib/cups/backend/nearest", line 75, in ooO00oOoo > if None != get_terminal_hfolder ( Ooo0 , oO0O ) : > File "/opt/thinlinc/modules/thinlinc/tlprinter.py", line 361, in get_terminal_hfolder > for O0OO0O in generate_alternative_hwaddrs ( hwaddr ) : > File "/opt/thinlinc/modules/thinlinc/tlprinter.py", line 318, in generate_alternative_hwaddrs > assert None != i11Iii , "Require internal hardware address format" > AssertionError: Require internal hardware address format Somewhere along the way an empty hardware address gets turned into the string "unknown", which doesn't match the regexp used in the generate_alternative_hwaddrs function.
