Log Name:      System
Source:        NetBT
Date:          12/14/2011 2:22:55 PM
Event ID:      4319
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      Dcadd
A duplicate name has been detected on the TCP network.  The IP address of the computer that sent the message is in the data. Use nbtstat -n in a command window to see which name is in the Conflict state.
Event Xml:
<Event xmlns="">
    <Provider Name="NetBT" />
    <EventID Qualifiers="49152">4319</EventID>
    <TimeCreated SystemTime="2011-12-14T19:22:55.437500000Z" />
    <Security />

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

Z:\>nbtstat -n

Local Area Connection:
Node IpAddress: [] Scope Id: []

                NetBIOS Local Name Table

       Name               Type         Status
    CAS1       <00>  UNIQUE      Registered
    CORP           <00>  GROUP       Registered
    CAS1       <20>  UNIQUE      Registered

Node IpAddress: [] Scope Id: []

                NetBIOS Local Name Table

       Name               Type         Status
    CAS1       <00>  UNIQUE      Registered
    CORP           <00>  GROUP       Registered
    CAS1       <20>  UNIQUE      Registered


asked 12/14/2011 02:37

NAMEWITHELD12's gravatar image


6 Answers:
It means the hostname of the machine is already in use on the network.
you hvae 2 machines with duplicate names


setasoujiro's gravatar image


prettu much the same error as duplicate IP address


answered 2011-12-14 at 22:45:08

xcas's gravatar image


This error apears when 2 computers with the same Computer name apears in the tcp/ip network. You should change Your computer name, or find another PC with the same name and change it's name.

Good luck!

answered 2011-12-14 at 22:48:48

donciakas's gravatar image


so this is like an IP confict but for netbios ?

so there is a duplicate netbios name ?


answered 2011-12-14 at 23:15:40

NAMEWITHELD12's gravatar image



answered 2011-12-14 at 23:16:45

NAMEWITHELD12's gravatar image


Usually, yes, tgis error is recored when two computers, whether server or workstation, both have the same computername.   Usually, hostname matches netbios name.  Right click MY COMPUTER and select properties, then select the computername tab.  Note the name.   The first portion of the full computername, up to tge first period is almost always the netbios name.  The error suggests that you have two or more computers that have this part being the same.  Within a domain/netbios domain, hosts must be unique for full operations.

This error can also show up when a machine has recently changed it's IP address but didnt update the master browser, and or has multiple network cards or even if you've just swapped the network card.

How many computers that on your network? If not too many, simply go to each machine and verify it's name.   From the ctrl alt del login screen, select the Options button to dusplay the Log onto field--thisll show you name withhout having to logon.  If no computers have the same name, it was a false alarm.   If you do find that there are multiple machines with the same names, your users will be reporting odd behaviors and failures.

answered 2011-12-14 at 23:28:08

BobintheNoc's gravatar image


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Asked: 12/14/2011 02:37

Seen: 226 times

Last updated: 12/14/2011 03:28