ncargex: 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/ncargex - from package: ncl-examples

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

On Debian possible default full paths are:

/usr/bin/ncargex - from package: libncarg-bin

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

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