I've been trying to connect to a DXR2.E from ABT Site via USB. 

The following is the 2 errors I keep getting:

1. Unable to save the BACnet stack configuration. Online communication is not possible. 

2. Communication error: Failure to open the transport. [Network number 55599 does not exist.]

BACstack is internal to ABT Site, can I manually check if it's correct?

Why does it look for a network number if DXREs do not have internal IP address? 

In my current setup, all I have is a single DXR2.E connected to my PC via USB. 

Any suggestions? 

Regards, 

Edward