ncargversion: 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/ncargversion - from package: ncl

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

On Debian possible default full paths are:

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

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

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