qwavcut: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/qwavcut - from package: quelcom

You may install the required package with command apt-get install {package}

Error in other languages:
qwavcut: bevel nie gevind nie
qwavcut: comandă negăsită
qwavcut: comando não encontrado
qwavcut: commande introuvable
qwavcut: command not found
qwavcut: käsku ei ole
qwavcut: không tìm thấy lệnh
qwavcut: komanda nerasta
qwavcut: Kommando nicht gefunden.
qwavcut: kommandot finns inte
qwavcut: komut yok
qwavcut: nie znaleziono polecenia
qwavcut: níor aimsíodh an t-ordú
qwavcut: no se encontró la orden
qwavcut: no s'ha trobat l'ordre
qwavcut: opdracht niet gevonden
qwavcut: parancs nem található
qwavcut: perintah tidak ditemukan
qwavcut: príkaz nenájdený
qwavcut: příkaz nenalezen
qwavcut: команда не найдена
qwavcut: командата не е открита
qwavcut: 命令找不到
qwavcut: コマンドが見つかりません