apply_diff_relay_logs: 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 Debian possible default full paths are:

/usr/bin/apply_diff_relay_logs - from package: mha4mysql-node

You may install the required package with command apt-get install {package}

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