mpbi-split: 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/mpbi-split - from package: mpb

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

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