Could not put device in monitor mode about owl

[MarkusTieger]

Does your wifi card support "active monitor mode" ?
The way i set my card into monitor mode:

• ip link set wlan0 down
• iw wlan0 set type monitor
• iw wlan0 set monitor active (error "command failed: Operation not supported (-95)" means, that it isn't supported on your card)
• ip link set wlan0 up

[JanBdf]

This is probably a bit late at this point but I will comment on it anyways for others experiencing the same issue. As far as I know you have to use -N with owl here to tell it that the device is already in monitor mode. Otherwise owl tries to change the mode from monitor to monitor which doesn't work. My source is this tutorial on how to use owl on an RPi 3