array-depth-roundtrip: 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/lib64/piglit/bin/array-depth-roundtrip - from package: piglit

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

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