hiz-depth-test-window-stencil1: 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-depth-test-window-stencil1 - from package: piglit

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

Error in other languages:
hiz-depth-test-window-stencil1: bevel nie gevind nie
hiz-depth-test-window-stencil1: comandă negăsită
hiz-depth-test-window-stencil1: comando não encontrado
hiz-depth-test-window-stencil1: commande introuvable
hiz-depth-test-window-stencil1: command not found
hiz-depth-test-window-stencil1: käsku ei ole
hiz-depth-test-window-stencil1: không tìm thấy lệnh
hiz-depth-test-window-stencil1: komanda nerasta
hiz-depth-test-window-stencil1: Kommando nicht gefunden.
hiz-depth-test-window-stencil1: kommandot finns inte
hiz-depth-test-window-stencil1: komut yok
hiz-depth-test-window-stencil1: nie znaleziono polecenia
hiz-depth-test-window-stencil1: níor aimsíodh an t-ordú
hiz-depth-test-window-stencil1: no se encontró la orden
hiz-depth-test-window-stencil1: no s'ha trobat l'ordre
hiz-depth-test-window-stencil1: opdracht niet gevonden
hiz-depth-test-window-stencil1: parancs nem található
hiz-depth-test-window-stencil1: perintah tidak ditemukan
hiz-depth-test-window-stencil1: príkaz nenájdený
hiz-depth-test-window-stencil1: příkaz nenalezen
hiz-depth-test-window-stencil1: команда не найдена
hiz-depth-test-window-stencil1: командата не е открита
hiz-depth-test-window-stencil1: 命令找不到
hiz-depth-test-window-stencil1: コマンドが見つかりません