DOCUMENT:Q302323 08-MAY-2002 [winnt] TITLE :The RPC Services May Hang Intermittently PRODUCT :Microsoft Windows NT PROD/VER::4.0 SP6a OPER/SYS: KEYWORDS:kbWinNT400PreSP7Fix ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server, Enterprise Edition version 4.0 SP6a - Microsoft Windows NT Server version 4.0 SP6a ------------------------------------------------------------------------------- SYMPTOMS ======== You may receive "RPC Server Unavailable" error messages intermittently on the server when you are running programs (such as Event Viewer) that use Remote Procedure Call (RPC). These error messages occur on servers that use two network adapters that are configured for fault tolerance. This problem is known to occur with the Intel family of fault-tolerant network adapters. CAUSE ===== There is a problem in Ndis.sys with unloading the network monitor driver (either Bhnt.sys or Nmnt.sys) when it is loaded in conjunction with network adapter teaming drivers. RESOLUTION ========== A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article and should be applied only to systems experiencing this specific problem. To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web: http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS NOTE: In special cases, charges that are normally incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. Normal support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The English version of this fix should have the following file attributes or later: Date Time Version Size File name Platform --------------------------------------------------------------- 24-Jul-2001 12:38 4.0.1381.7097 121,872 Ndis.sys x86 WORKAROUND ========== To work around this problem, rename the network monitor driver (either Bhnt.sys or Nmnt.sys) in the %SystemRoot%\System32\Drivers folder, and then reboot the computer. This prevents the driver from being loaded. STATUS ====== Microsoft has confirmed this to be a problem in the Microsoft products that are listed at the beginning of this article. Additional query words: nic ====================================================================== Keywords : kbWinNT400PreSP7Fix Technology : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTSEntSearch kbWinNTS400sp6 kbWinNTS400search kbWinNTSEnt400SP6a Version : :4.0 SP6a Hardware : ALPHA x86 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.