arb_blend_func_extended-getfragdataindex: 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/arb_blend_func_extended-getfragdataindex - from package: piglit

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

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