ras2ccir601: 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/ras2ccir601 - from package: ncl

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

On Debian possible default full paths are:

/usr/bin/ras2ccir601 - from package: ncl-ncarg

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

Error in other languages:
ras2ccir601: bevel nie gevind nie
ras2ccir601: comandă negăsită
ras2ccir601: comando não encontrado
ras2ccir601: commande introuvable
ras2ccir601: command not found
ras2ccir601: käsku ei ole
ras2ccir601: không tìm thấy lệnh
ras2ccir601: komanda nerasta
ras2ccir601: Kommando nicht gefunden.
ras2ccir601: kommandot finns inte
ras2ccir601: komut yok
ras2ccir601: nie znaleziono polecenia
ras2ccir601: níor aimsíodh an t-ordú
ras2ccir601: no se encontró la orden
ras2ccir601: no s'ha trobat l'ordre
ras2ccir601: opdracht niet gevonden
ras2ccir601: parancs nem található
ras2ccir601: perintah tidak ditemukan
ras2ccir601: príkaz nenájdený
ras2ccir601: příkaz nenalezen
ras2ccir601: команда не найдена
ras2ccir601: командата не е открита
ras2ccir601: 命令找不到
ras2ccir601: コマンドが見つかりません