ncargfile: 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/ncargfile - from package: ncl

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

On Debian possible default full paths are:

/usr/bin/ncargfile - from package: ncl-ncarg

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

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