M2VRequantiser: 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/M2VRequantiser - from package: m2vrequantiser

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

Error in other languages:
M2VRequantiser: bevel nie gevind nie
M2VRequantiser: comandă negăsită
M2VRequantiser: comando não encontrado
M2VRequantiser: commande introuvable
M2VRequantiser: command not found
M2VRequantiser: käsku ei ole
M2VRequantiser: không tìm thấy lệnh
M2VRequantiser: komanda nerasta
M2VRequantiser: Kommando nicht gefunden.
M2VRequantiser: kommandot finns inte
M2VRequantiser: komut yok
M2VRequantiser: nie znaleziono polecenia
M2VRequantiser: níor aimsíodh an t-ordú
M2VRequantiser: no se encontró la orden
M2VRequantiser: no s'ha trobat l'ordre
M2VRequantiser: opdracht niet gevonden
M2VRequantiser: parancs nem található
M2VRequantiser: perintah tidak ditemukan
M2VRequantiser: príkaz nenájdený
M2VRequantiser: příkaz nenalezen
M2VRequantiser: команда не найдена
M2VRequantiser: командата не е открита
M2VRequantiser: 命令找不到
M2VRequantiser: コマンドが見つかりません