mpdgdbdrv.py: 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/bin/mpdgdbdrv.py - from package: mpich2

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

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