Microsoft KB Archive/837822

= Access violation when you use WinHTTP in Microsoft Windows Server 2003 =

Article ID: 837822

Article Last Modified on 7/24/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Web Edition
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows Server 2003, 64-Bit Datacenter Edition
 * Microsoft Windows XP Professional for Itanium-based systems

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SUMMARY
When you use Microsoft Windows HTTP Services (WinHTTP) in a program across a slow network, you may receive the following access violation error message:


 * WinHttp Assertion failed: error == ERROR_SUCCESS && fsm.m_dwBytesRead - fsm.m_nBytesCopied == dwChunkBytesRead


 * Source file: c:\svr03\inetcore\winhttp\v5.1\http\read.cxx


 * Source line: 845


 * Thread 00000ff8



Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
No prerequisites are required.

Restart requirement
You must restart your 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) 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 tool in Control Panel.

IA-64
  Date         Time   Version            Size    File name --  04-Mar-2004  18:36  5.2.3790.137      909,824  Winhttp.dll

x86
  Date         Time   Version            Size    File name --  04-Mar-2004  18:32  5.2.3790.137      337,920  Winhttp.dll



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For additional information about standard terminology used to describe software updates, 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

Additional query words: overruns asynchronously AV buffer dump winsock

Keywords: kbhotfixserver kbqfe kbnetwork kbwinservnetwork kbhttp501 kbhttp500100 kbhttp kberrmsg kbwinserv2003presp1fix kbinterop kbqfe kbfix kbbug KB837822

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