The command '/sbin/ifconfig 'ath0_wlan1' up mode ... returned exit code '1'

[hirschferkel]

Does anybody know how to deal with that log:

opnsense: /interfaces_assign.php: The command '/sbin/ifconfig 'ath0_wlan1' up mode '11b' ssid 'xxxxxx' protmode 'off' channel '44' mediaopt hostap -mediaopt adhoc -hidessid -pureg -puren -apbridge -mediaopt turbo -wme authmode open wepmode off ' returned exit code '1', the output was 'ifconfig: SIOCS80211: Invalid argument'