Terminal Server Application Error: Duplicate NetBIOS Name (186519)


The information in this article applies to:

  • Microsoft Windows NT Server 4.0 Terminal Server Edition
This article was previously published under Q186519
IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information about how to do this, view the "Restoring Registry" Help topic in Regedit.exe or the "Restoring a Registry Key" Help topic in Regedt32.exe.

SYMPTOMS

When you run an application on a Terminal Server computer, you may see the following error message:
Duplicate NetBIOS Name In Use

CAUSE

Some applications make use of a NetBIOS function to discover the computer name of the computer the application is running on. When more than one user runs the application, Terminal Server can return each user's logon name rather than the computer name to an application that is making this NetBIOS call.

RESOLUTION

To resolve this problem, perform the following steps:

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it.

  1. Log on to the Terminal Server computer as an administrator, start Registry Editor (Regedt32.exe), and go to the following subkey to create a key for your application's executable file name: 
    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion
      \Terminal Server\Compatibility\Application.
    NOTE: The above registry key is one path; it has been wrapped for readability.
  2. To add a key for your application, select the "..\Application" subkey, and from the Edit menu, click Add Key.
  3. Type the name of your application's executable file (less the extension and leave the "Class" field empty), and then press Enter.
  4. Select the application name subkey you just created, and from the Edit menu, click Add value.
  5. Type the following information, and then press Enter.

    Value Name: flags Data Type: REG_DWORD

  6. You will be prompted for data at this point. Type "1F" so that whenever the application you specified is run, Terminal Server will report the username instead of the computer name.
NOTE: This list of application compatibility flags can be used to determine the value to be put into the above requested "flag value" to set the compatibility parameter you need. These are hexadecimal values and should be added together to create the appropriate flag value.
  • DOS 0x00000001 - An MS-DOS application
  • OS2 0x00000002 - An OS/2 application
  • WIN16 0x00000004 - A Win16 application
  • WIN32 0x00000008 - A Win32 application
  • ALL 0x0000000F
  • USERNAME 0x00000010 - return user name for computer name (In the above case, then, the flag value of 1F is a combination of the ALL applications value 0x0000000F and the USERNAME value of 0x00000010)
  • BLDNUM 0x00000020 - return Terminal Server build number
  • INISYNC 0x00000040 - sync user .INI file to system
  • ININOSUB 0x00000080 - Do not substitute the user's system directory for Terminal Server's system directory
Modification Type:MajorLast Reviewed:12/2/2002
Keywords:kbprb KB186519
©2002 Microsoft Corporation. All rights reserved.