mgp2html: 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/mgp2html - from package: mgp

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

Error in other languages:
mgp2html: bevel nie gevind nie
mgp2html: comandă negăsită
mgp2html: comando não encontrado
mgp2html: commande introuvable
mgp2html: command not found
mgp2html: käsku ei ole
mgp2html: không tìm thấy lệnh
mgp2html: komanda nerasta
mgp2html: Kommando nicht gefunden.
mgp2html: kommandot finns inte
mgp2html: komut yok
mgp2html: nie znaleziono polecenia
mgp2html: níor aimsíodh an t-ordú
mgp2html: no se encontró la orden
mgp2html: no s'ha trobat l'ordre
mgp2html: opdracht niet gevonden
mgp2html: parancs nem található
mgp2html: perintah tidak ditemukan
mgp2html: príkaz nenájdený
mgp2html: příkaz nenalezen
mgp2html: команда не найдена
mgp2html: командата не е открита
mgp2html: 命令找不到
mgp2html: コマンドが見つかりません