DOCUMENT:Q242472 08-MAY-2002 [winnt] TITLE :Access Violation in Perfmon If Long Extensible Counter DLL Path PRODUCT :Microsoft Windows NT PROD/VER:winnt:4.0,4.0 SP4,4.0 SP5 OPER/SYS: KEYWORDS:kbWinNT400PreSP7Fixkbfixlist ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server versions 4.0, 4.0 SP4, 4.0 SP5 - Microsoft Windows NT Server, Enterprise Edition versions 4.0, 4.0 SP4, 4.0 SP5 - Microsoft Windows NT Workstation versions 4.0, 4.0 SP4, 4.0 SP5 ------------------------------------------------------------------------------- SYMPTOMS ======== If the Performance Monitor extensible counter dynamic-link library (DLL) path in the registry contains more than 62 characters, you receive an "Access violation" error message in Performance Monitor (Perfmon.exe) when you click Add Counters in any chart, log, or report. CAUSE ===== This problem can occur if the Performance Monitor extensible counter DLL path in the registry, which is a long string of more than 62 characters, gets concatenated in the small size buffer. This causes a buffer overflow. 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-language of this fix should have the following file attributes or later: Date Time Size File name Platform ------------------------------------------------------------- 09/24/99 05:59 PM 247,056 Advapi32.dll Intel 09/24/99 05:58 PM 404,240 Advapi32.dll Alpha 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: ====================================================================== Keywords : kbWinNT400PreSP7Fix kbfixlist Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTW400sp5 kbWinNTW400sp4 kbWinNTSsearch kbWinNTSEntSearch kbWinNTSEnt400sp5 kbWinNTSEnt400sp4 kbWinNTSEnt400 kbWinNTS400sp5 kbWinNTS400sp4 kbWinNTS400search kbWinNTS400 Version : winnt:4.0,4.0 SP4,4.0 SP5 Hardware : ALPHA x86 Issue type : kbprb Solution Type : kbfix ============================================================================= 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.