hiz-stencil-test-window-depth1: 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/hiz-stencil-test-window-depth1 - from package: piglit

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

Error in other languages:
hiz-stencil-test-window-depth1: bevel nie gevind nie
hiz-stencil-test-window-depth1: comandă negăsită
hiz-stencil-test-window-depth1: comando não encontrado
hiz-stencil-test-window-depth1: commande introuvable
hiz-stencil-test-window-depth1: command not found
hiz-stencil-test-window-depth1: käsku ei ole
hiz-stencil-test-window-depth1: không tìm thấy lệnh
hiz-stencil-test-window-depth1: komanda nerasta
hiz-stencil-test-window-depth1: Kommando nicht gefunden.
hiz-stencil-test-window-depth1: kommandot finns inte
hiz-stencil-test-window-depth1: komut yok
hiz-stencil-test-window-depth1: nie znaleziono polecenia
hiz-stencil-test-window-depth1: níor aimsíodh an t-ordú
hiz-stencil-test-window-depth1: no se encontró la orden
hiz-stencil-test-window-depth1: no s'ha trobat l'ordre
hiz-stencil-test-window-depth1: opdracht niet gevonden
hiz-stencil-test-window-depth1: parancs nem található
hiz-stencil-test-window-depth1: perintah tidak ditemukan
hiz-stencil-test-window-depth1: príkaz nenájdený
hiz-stencil-test-window-depth1: příkaz nenalezen
hiz-stencil-test-window-depth1: команда не найдена
hiz-stencil-test-window-depth1: командата не е открита
hiz-stencil-test-window-depth1: 命令找不到
hiz-stencil-test-window-depth1: コマンドが見つかりません