mp3splt: 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/mp3splt - from package: mp3splt

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

Error in other languages:
mp3splt: bevel nie gevind nie
mp3splt: comandă negăsită
mp3splt: comando não encontrado
mp3splt: commande introuvable
mp3splt: command not found
mp3splt: käsku ei ole
mp3splt: không tìm thấy lệnh
mp3splt: komanda nerasta
mp3splt: Kommando nicht gefunden.
mp3splt: kommandot finns inte
mp3splt: komut yok
mp3splt: nie znaleziono polecenia
mp3splt: níor aimsíodh an t-ordú
mp3splt: no se encontró la orden
mp3splt: no s'ha trobat l'ordre
mp3splt: opdracht niet gevonden
mp3splt: parancs nem található
mp3splt: perintah tidak ditemukan
mp3splt: príkaz nenájdený
mp3splt: příkaz nenalezen
mp3splt: команда не найдена
mp3splt: командата не е открита
mp3splt: 命令找不到
mp3splt: コマンドが見つかりません