Arrays: 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/Arrays - from package: vtk-examples

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

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