Basics

The device drivers does not directly connect to the printer. It connects itself to a local windows service.

Error COM_0040

The logs are saying : Caused by: java.net.ConnectException: Connection refused: connect

Ensure that the service is Running:

Or run the command telnet 127.0.0.1 18000, which should not display any error

Enable debug logs

To do modify the log level, you have to