qwavjoin: 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/qwavjoin - from package: quelcom

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

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