ncidd: 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/sbin/ncidd - from package: ncid

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

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