glx-oml-sync-control-swapbuffersmsc-return: 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/glx-oml-sync-control-swapbuffersmsc-return - from package: piglit

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

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