wavcmp: 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/wavcmp - from package: musepack-tools

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

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