Event 2506 When Starting Windows 2000

ID: Q238316

The information in this article applies to:
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Professional
  • Microsoft Windows 2000 Datacenter Server
  • Microsoft Windows 2000 Advanced Server
IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information about how to do this, view the "Restoring the Registry" Help topic in Regedit.exe or the "Restoring a Registry Key" Help topic in Regedt32.exe.

SYMPTOMS

When you start Windows 2000, the following error message may be displayed in the system event log:

Event: 2506
Source: Server
The value named IRPStackSize in the server's Registry key LanmanServer\Parameters was invalid. The value was ignored, and processing continued.


CAUSE

This behavior occurs if you set the IRPStackSize value (manually or programmatically) to less than 11. The IRPStackSize value is set to 11 by default in Windows 2000 and it is enforced as the minimum setting.

This behavior commonly occurs when the IRPStackSize value is changed to less than 11 programmatically (for example, during Setup for a program).


RESOLUTION

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys and Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it. If you are running Windows NT, you should also update your Emergency Repair Disk (ERD).

To return the IRPStackSize value to the default setting:

  1. Start Registry Editor (Regedt32.exe).


  2. Locate the IRPStackSize value under the following registry key:


    3. HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Lanmanserver\Parameters
  3. On the Edit menu, click DWORD.


  4. Type 11, and then click OK.


  5. Quit Registry Editor, and then restart Windows 2000.



STATUS

This behavior is by design.


MORE INFORMATION

For additional information, please click the article numbers below to view the articles in the Microsoft Knowledge Base:

Q198386 Changes in IRP Stack Size in Lanman Server
Q225782 Err Msg: Not Enough Server Storage Is Available to Process...

Additional query words:

Keywords : kb3rdparty kbenv
Version : WINDOWS:2000
Platform : WINDOWS
Issue type : kbprb


Last Reviewed: December 29, 1999
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