FIX: Access Violation in Microsoft XML 4.0 When Service Pack 1 Performs Tranforms on Cached XML Documents (326860)


The information in this article applies to:

  • Microsoft XML 4.0 SP1
This article was previously published under Q326860

SYMPTOMS

Microsoft XML (MSXML) may experience random failures (access violations) when MSXML 4.0 Service Pack 1 (SP1) performs transforms on a free-threaded XML Document Object Model (DOM) document from multiple threads simultaneously. This problem is more likely to occur on multi-processor computers, and to occur under stress.

CAUSE

An internal part of the free-threaded XML DOM document is prematurely destroyed when MSXML 4.0 SP1 performs a transform. This issue occurs when MSXML cleans up a stack frame and, during this operation, uses a node attribute as a template parameter. Re-using this node may cause random failures because of the use of freed memory or the use of corrupted data.

RESOLUTION

A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next MSXML service pack that contains this hotfix.

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

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

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 typical 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 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.
   Date         Time   Version      Size (bytes)  File name
   --------------------------------------------------------------
   06-Sep-2002  16:44  4.10.9405.0     1,230,848  Msxml4.dll

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
Modification Type:MinorLast Reviewed:10/11/2005
Keywords:kbHotfixServer kbQFE kbBug kbfix kbMSXML400fix kbQFE KB326860
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