csclng++: command not found

Have You tried accessing the binary with the full path?

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/csclng++ - from package: csclng

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