hi
when that run this code
:

sudo /etc/init.d/PiGatewaySerial start

error:

[....] Starting PiGatewaySerial (via systemctl): PiGatewaySerial.serviceFailed to start PiGatewaySerial.service: Unit PiGatewaySerial.service failed to load: No such file or directory.

can you help me??