wmpomme: 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/wmpomme - from package: wmpomme

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

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