Hello,
The read ECONNRESET error is not an OData/NAV error but means the server is dropping the connection, which in NAV 2013 R2 is usually due to wrong OData port, wrong authentication type, or SSL/TLS issues. Most commonly, NAV OData is configured for Windows (NTLM) authentication, while Postman is sending Basic auth, causing NAV or IIS to reset the connection. Verify you are using the exact OData port from the NAV Service Tier, switch Postman auth to NTLM (DOMAIN\user), and confirm SSL bindings/TLS if using HTTPS. If you hit the correct port with the correct auth, the endpoint should respond.
Regards,
Oussama