kokyu.mpb: command not found

Have You tried accessing the binary with the full path?

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"

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