makempy: 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/makempy - from package: texlive-context

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

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