A duplicate name has been detected on the TCP network. The IP address of the machine that sent the message is in the data. Use nbtstat -n in a command window to see which name is in the Conflict state.
The name "DomainName :1d" could not be registered on the Interface with IP address w.x.y.z. The machine with the IP address w.x.y.a did not allow the name to be claimed by this machine.