MakeNcl: 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/MakeNcl - from package: ncl-devel

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

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