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

This article was previously published under Q326860
This article has been archived. It is offered "as is" and will no longer be updated.
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.
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.
A supported hotfix is 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 software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language. 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       				

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

Article ID: 326860 - Last Review: 02/27/2014 21:14:26 - Revision: 2.6

Microsoft XML Core Services 4.0 Service Pack 1

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