You receive a "Stop 0x000000ab" error message when you log off from a Terminal Services session on a Windows Server 2003 SP1-based terminal server

When you log off from a Terminal Services session on a Microsoft Windows Server 2003 Service Pack 1 (SP1)-based terminal server, you may receive the following error message:

This problem may occur if a driver has Session Pool Memory allocations that are not de-allocated or freed when a user logs off. The bug check 0xAB error is caused by a session driver that does not free its pool allocations before a session unload. This indicates that there is a bug in the Win32k.sys file, in the Stmfd.dll file, in the Rdpdd.dll file, or in a video driver.

For more information about the bug check 0xAB error, see the "More Information" section.

This hotfix is replaced by hotfix 910362.

Service pack information

To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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. 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.

Prerequisites

To apply this hotfix to Itanium-based versions of Windows Server 2003 or to x86-based versions of Windows Server 2003, you must have Windows Server 2003 SP1 installed on your computer.

Restart requirement

You must restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix replaces hotfix 901150.

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 tool in Control Panel.

Windows Server 2003, x86-based versions

Windows Server 2003, x64-based versions

Windows Server 2003, Itanium-based versions

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Server 2003 Service Pack 2.

Bug check 0xAB: SESSION_HAS_VALID_POOL_ON_EXIT

The SESSION_HAS_VALID_POOL_ON_EXIT bug check has a value of 0x000000AB. This indicates that a session unload occurred when a session driver still held memory.

The following parameters appear on a blue screen.

Technical support for Windows x64 editions

Your hardware manufacturer provides technical support and assistance for Microsoft Windows x64 editions. Your hardware manufacturer provides support because a Windows x64 edition was included with your hardware. Your hardware manufacturer might have customized the Windows x64 edition installation with unique components. Unique components might include specific device drivers or might include optional settings to maximize the performance of the hardware. Microsoft will provide reasonable-effort assistance if you need technical help with your Windows x64 edition. However, you might have to contact your manufacturer directly. Your manufacturer is best qualified to support the software that your manufacturer installed on the hardware.

For product information about Microsoft Windows XP Professional x64 Edition, visit the following Microsoft Web site: For product information about Microsoft Windows Server 2003 x64 editions, visit the following Microsoft Web site:

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

For more information about the "Stop 0x000000AB" error message, click the following article numbers to view the articles in the Microsoft Knowledge Base: