Airodump-ng or No interface specified problem.

[Rikopara]

Hello there. When I'm trying to use command

airodump-ng --bssid <address> --channel <channel> -w <destination folder>

I just get answer

No interface specified

I already tried all methods that I know. Destination folder already exist. Root enabled. After typing

airmon-ng start wlan0mon

console says

(mac80211 monitor mode already enabled for [phy0]wlan0mon on [phy0]wlan0mon)

My wifi chipset is Athernos 9485 and driver is ath9k (2016) for windows 8. I don't know any solutions for this problem so I hope someone can help me.

[dustednoob]

you have to define the network adapter for airodump-ng

airodump-ng --bssid <address> -c <channel> -w <folder/file> wlan0mon

if you use a dual band wifi adapter you can define the band where it should listen

airodump-ng --bssid <address> --band <band letter> -c <channel> -w <folder/file> wlan0mon

a= 5GHz band
b= 2.4GHz band
g= 2.4GHz band

for example: --band a or --band abg