ocpp5: 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/ocpp5 - from package: camlp5

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

Error in other languages:
ocpp5: bevel nie gevind nie
ocpp5: comandă negăsită
ocpp5: comando não encontrado
ocpp5: commande introuvable
ocpp5: command not found
ocpp5: käsku ei ole
ocpp5: không tìm thấy lệnh
ocpp5: komanda nerasta
ocpp5: Kommando nicht gefunden.
ocpp5: kommandot finns inte
ocpp5: komut yok
ocpp5: nie znaleziono polecenia
ocpp5: níor aimsíodh an t-ordú
ocpp5: no se encontró la orden
ocpp5: no s'ha trobat l'ordre
ocpp5: opdracht niet gevonden
ocpp5: parancs nem található
ocpp5: perintah tidak ditemukan
ocpp5: príkaz nenájdený
ocpp5: příkaz nenalezen
ocpp5: команда не найдена
ocpp5: командата не е открита
ocpp5: 命令找不到
ocpp5: コマンドが見つかりません