Error message on a Windows XP-based computer when you work with a network share: "STOP: 0x000000C2 BAD_POOL_CALLER"


When you work with a network share on a Windows XP-based computer, you may receive the following error message:
STOP: 0x000000C2 (Parameter1, Parameter2, Parameter3, Parameter4)



When a Kerberos ticket times out, the Redirector (RDR) component has to update the ticket. To do this, the RDR starts a new session. Then, RDR returns the STATUS_RETRY status code to the top level handler that retries the previous operation.

In a CLOSE operation, the retry logic cannot roll back all the work that the logic has already done. Therefore, when the operation is retried, the client computer stops responding. The server does not stop a session on a CLOSE operation. However, when multiple operations coexist, the RDR may fail. Also, certain timing conditions, the CLOSE operation may expire.


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.


To apply this hotfix, you must have Windows XP Service Pack 2 installed.

Restart requirement

You have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other previously released hotfixes.

Registry information

To use this hotfix, you do not have to make any changes to the registry.

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 item in Control Panel.
Windows XP, x86-based versions
File nameFile versionFile sizeDateTimePlatform


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

More Information

The scenario that is mentioned in the "Cause" section may also cause a third-party file server to return the STATUS_NETWORK_SESSION_EXPIRED status code on a CLOSE operation when the server causes a client computer to stop responding.

For more information, 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


Article ID: 944904 - Last Review: May 27, 2008 - Revision: 1