mpdsigjob.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/mpdsigjob.py - from package: mpich2

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

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