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Microsoft KB Archive/925362

From BetaArchive Wiki

Article ID: 925362

Article Last Modified on 10/31/2006


  • Microsoft Visual C++ .NET 2003 Standard Edition


Consider the following scenario:

  • You create a C++ application in Microsoft Visual C++ .NET 2003. The following conditions are true:
    • The C++ application is a multithreaded application.
    • Multiple threads call the _fopen function in the C run-time library.
  • You compile and then run the application
  • A thread calls the _fopen function.
  • Another thread calls the _fopen function before the first call is completed successfully.

In this scenario, you may experience poor performance.

Note This problem is more noticeable when the file that is opened by the first thread takes a long time to open. For example, if this file is located on a remote network, you may experience poor performance.


This problem occurs because of a race condition in the C run-time library.


Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Visual Studio .NET 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

File name File version File size Date Time
A_map.c Not Applicable 13,858 21-Sep-2006 01:40
Eh.lib Not Applicable 363,744 21-Sep-2006 01:56
Io.h Not Applicable 10,456 21-Sep-2006 01:40
Ios.cpp Not Applicable 4,246 06-Feb-2004 19:29
Libc.lib Not Applicable 2,707,612 21-Sep-2006 01:57
Libcd.lib Not Applicable 3,023,960 21-Sep-2006 02:00
Libcmt.lib Not Applicable 2,937,932 21-Sep-2006 01:58
Libcmtd.lib Not Applicable 3,305,620 21-Sep-2006 02:01
Libcp.lib Not Applicable 3,601,406 21-Sep-2006 01:58
Libcpd.lib Not Applicable 4,433,774 21-Sep-2006 02:00
Libcpmt.lib Not Applicable 3,651,698 21-Sep-2006 01:59
Libcpmtd.lib Not Applicable 4,449,888 21-Sep-2006 02:01
Msvcp71.dll 7.10.5054.0 499,712 21-Sep-2006 02:23
Msvcp71d.dll 7.10.5054.0 765,952 21-Sep-2006 02:02
Msvcprt.lib Not Applicable 1,360,324 21-Sep-2006 01:59
Msvcprtd.lib Not Applicable 1,369,260 21-Sep-2006 02:02
Msvcr71.dll 7.10.7020.4 344,064 16-Sep-2006 02:51
Msvcr71d.dll 7.10.5054.0 544,768 21-Sep-2006 02:02
Msvcrt.lib Not Applicable 431,200 21-Sep-2006 01:59
Msvcrtd.lib Not Applicable 442,910 21-Sep-2006 02:02
Popen.c Not Applicable 17,400 21-Sep-2006 01:40
Read.c Not Applicable 9,948 21-Sep-2006 01:40
Vc_user_crt71_rtl_x86_---.msm Not Applicable 202,240 21-Sep-2006 09:17
Vc_user_stl71_rtl_x86_---.msm Not Applicable 151,040 21-Sep-2006 09:17


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbfix kbbug kbhotfixserver kbqfe kbpubtypekc KB925362