mformat: 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 CentOS possible default full paths are:

/usr/bin/mformat - from package: mtools

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/mformat - from package: mtools

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

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