The following figure shows the error message.

Figure 1. Nymi Agent is missing error

Cause 1

The Nymi Agent service is not running on the Nymi Band Application Terminal.

Resolution 1

Perform the following steps to start the Nymi Agent service.

• Open the Window Services and locate the Nymi Agent service.
• Start the Nymi Agent service.
• Close the Nymi Band Application.
• Open and log in to the Nymi Band Application.

Cause 2

In a centralized Nymi Agent configuration, the firewall between the Nymi Band Application Terminal host and the Nymi Agent server does not allow websocket traffic over port 9120.

The nymi_api.log file on the client machine has the following errors:

                INFO - connecting to Agent at ws://server.ca:9120/socket/websocket
                ERROR - Could not connect to websocket server. Attempting to connect again.
                INFO - sending update to nea {"operation":"error","exchange":null,"status":4000,"payload":{},"error":{"errordescription":"Nymi Agent missing.","errorspecifics":""}}
            

Resolution 2

Update the firewall port rules.