DOCUMENT:Q241110 06-AUG-2002 [winnt] TITLE :"Computer Name Not Found" Using Performance Monitor PRODUCT :Microsoft Windows NT PROD/VER::4.0 OPER/SYS: KEYWORDS:kberrmsg kbtool ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 ------------------------------------------------------------------------------- IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base: Q256986 Description of the Microsoft Windows Registry SYMPTOMS ======== When you attempt to run Performance Monitor locally or to monitor a remote Windows NT-based computer, you may receive the following error message: Computer name not found. CAUSE ===== This error message can occur for any of the following reasons: - Client network connectivity problems - NetBIOS name resolution problems - Problems with registry permissions - Corrupted settings files for Performance Monitor RESOLUTION ========== Check NetBIOS Name Resolution ----------------------------- Check NetBIOS name resolution and network connectivity first by typing the following command at a command prompt net view \\ where is the computer to which you are trying to connect with Performance Monitor. Issue this command over the network and at the target computer. If the command works successfully and you see a list of the shared resources on the server, try the following method. Check Registry Permissions -------------------------- WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk. Start Registry Editor (Regedt32.exe) and check the permissions on the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurePipeServers\Winreg Administrators should have full control by default. For additional information about modifying permissions, click the article number below to view the article in the Microsoft Knowledge Base: Q164018 Controlling Remote Performance Monitor Access to WinNT Servers Check or Replace Files ---------------------- 1. In the %SystemRoot%\System32 folder, rename the Perfc009.dat file to Perfc009.old. Rename the Perfh009.dat file to Perfh009.old. 2. Copy the Perfc009.da_ and Perfh009.da_ files from the Windows NT 4.0 CD-ROM to the %SystemRoot%\System32 folder on the local computer. 3. At a command prompt, type the following lines in the %SystemRoot%\System32 folder, pressing ENTER after each line: Expand.exe Perfc009.da_ Perfc009.dat Expand.exe Perfh009.da_ Perfh009.dat NOTE: If replacing the Perfc009.dat file corrects the problem, you must reinstall your counters for any program that you have installed previously and want to monitor. Alternately, if you have a known good backup of this file you may be able to restore functionality by restoring the backup copy avoiding having to reinstall all of your counters. For additional information about Microsoft Exchange counters, click the article number below to view the article in the Microsoft Knowledge Base: Q156494 Restoring Lost Performance Counters for Exchange For additional information about Microsoft SQL Server counters, click the article number below to view the article in the Microsoft Knowledge Base: Q227662 SQL Performance Monitor Counters Missing Follow the steps in the "Problems with Performance Monitor Files" section. Additional query words: perfmon ====================================================================== Keywords : kberrmsg kbtool Technology : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 Version : :4.0 Issue type : kbprb ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.