wmwave: 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/wmwave - from package: wmwave

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

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