Access Violation Occurs When You Run a Multithreaded Program on a Heavily Loaded Computer

When you run a program in a multithreaded environment, you may experience both of the following symptoms:

• The program intermittently stops responding (hangs).
• The program intermittently crashes and generates an access violation error message.

This problem may occur if all the following conditions are true:

• The computer running the program is under a heavy load.
• The program creates and destroys ios-derived classes in multiple threads.
• The program uses the old iostream library instead of the Standard C++ library that was introduced in Microsoft Visual C++ 5.0.

Hotfix Information

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.

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, submit a request to 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.

Prerequisites

You must be running Microsoft Windows 2000 Service Pack 3 (SP3) or later to install this hotfix. For additional information about how to obtain the latest Windows 2000 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

Restart Requirement

You do not have to 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.

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

For additional information about this problem, click the following article number to view the article in the Microsoft Knowledge Base: For additional information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:For additional information, click the following article number to view the article in the Microsoft Knowledge Base: