This article was previously published under Q120752
On your Windows NT-based computer, you may receive one of the following event log messages in Event Viewer:
Event ID: 4320 Source: NetBT Type: Error Description: Another machine has sent a name release message to thismachine probably because a duplicate name has beendetected on the TCP network. The IP address of the nodethat sent the message is in the data. Use nbtstat -n in acommand window to see which name is in the Conflict state.
Event ID: 4319 Source: NetBT Type: Error Description: 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 check which name is in the conflict state.
This message is caused when another computer sends a name release messageto your computer. The most likely reason for this is that a duplicate namehas been detected on the network.
Use the NBTSTAT -N command to see the name of the computer in the conflictstate. The IP address of the node that sent the message is in the datareturned by this command. The following example shows what the data maylook like in one of these events:
Offset 28 is the IP address of the computer requesting name release. Todetermine the decimal IP address, invert the four hexadecimal numbers andconvert them to decimal numbers separated by periods. Using this method,the IP address of E7 1A 65 16 becomes 126.96.36.199.
The status column of the NBTSTAT output for the computer in conflict shouldcontain either "Conflict" or "Released."
You can run the NBTSTAT -A command with the IP address to get the computername.
NOTE: This error message is generated in many cases due to normalcircumstances, and should not be cause for alarm.