The CAD attempted to register it's tcpport and tcpip address but the TCP/IP address resolved to the loopback address and was rejected by the server.
The CAD sent the port and address information to the server, however, there was a problem registering the information with the server. The problem occurred because the server detected that the address provided resolved to the loopback address.
The server did not register the information for the CAD. CAD processing will continue, but some functions of the CAD may not be working properly.
Use TCPCADADDRESS in the client option file to indicate the proper TCP/IP address for this CAD. Loopback address is not valid.