mml2json.js: 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/lib/nodejs/carto/bin/mml2json.js - from package: node-carto

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

Error in other languages:
mml2json.js: bevel nie gevind nie
mml2json.js: comandă negăsită
mml2json.js: comando não encontrado
mml2json.js: commande introuvable
mml2json.js: command not found
mml2json.js: käsku ei ole
mml2json.js: không tìm thấy lệnh
mml2json.js: komanda nerasta
mml2json.js: Kommando nicht gefunden.
mml2json.js: kommandot finns inte
mml2json.js: komut yok
mml2json.js: nie znaleziono polecenia
mml2json.js: níor aimsíodh an t-ordú
mml2json.js: no se encontró la orden
mml2json.js: no s'ha trobat l'ordre
mml2json.js: opdracht niet gevonden
mml2json.js: parancs nem található
mml2json.js: perintah tidak ditemukan
mml2json.js: príkaz nenájdený
mml2json.js: příkaz nenalezen
mml2json.js: команда не найдена
mml2json.js: командата не е открита
mml2json.js: 命令找不到
mml2json.js: コマンドが見つかりません