ncargf77: 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/ncargf77 - from package: ncl-devel

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

On Debian possible default full paths are:

/usr/bin/ncargf77 - from package: libncarg-bin

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

Error in other languages:
ncargf77: bevel nie gevind nie
ncargf77: comandă negăsită
ncargf77: comando não encontrado
ncargf77: commande introuvable
ncargf77: command not found
ncargf77: käsku ei ole
ncargf77: không tìm thấy lệnh
ncargf77: komanda nerasta
ncargf77: Kommando nicht gefunden.
ncargf77: kommandot finns inte
ncargf77: komut yok
ncargf77: nie znaleziono polecenia
ncargf77: níor aimsíodh an t-ordú
ncargf77: no se encontró la orden
ncargf77: no s'ha trobat l'ordre
ncargf77: opdracht niet gevonden
ncargf77: parancs nem található
ncargf77: perintah tidak ditemukan
ncargf77: príkaz nenájdený
ncargf77: příkaz nenalezen
ncargf77: команда не найдена
ncargf77: командата не е открита
ncargf77: 命令找不到
ncargf77: コマンドが見つかりません