Microsoft KB Archive/136150

= Srv Event 2000 with Status Code C000023A =

Article ID: 136150

Article Last Modified on 10/31/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 3.51
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q136150



SYMPTOM
The following error appears in your system log:

Event ID: 2000

Description:

The server's call to a system service failed unexpectedly.

Data: Words

0000: 00040000 00540001 00000000 c00007d0

0010: 00000000 c000023a 00000000 00000000

0020: 00000000 00000000 13830bbe

NOTE: There are many causes for Srv 2000 error messages. The data segment must match the above exactly (c0000023a and bbe) for the information in this article to apply.



CAUSE
The size of request buffers on your computer running Windows NT Server is too small.

If the request buffer size is too small, the Windows NT server discards the command contained in the server message block (SMB) and logs an error in the system log. The client determines that the server has not satisfied its request and, therefore, resends the request. If the server has enough buffer resources it processes the command without logging an error in the system log.



RESOLUTION
Increase the size of request buffers on your computer running Windows NT.

NOTE: Larger request buffers require more memory, but improve performance.

To increase the size of request buffers, you need to modify the SizReqBuf entry in the registry:

WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk.


 * 1) Run REGEDT32.EXE and locate the following registry subkey under the HKEY_LOCAL_MACHINE subtree:

\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters
 * 1) From the Edit menu, choose Add Value and type SizReqBuf in the Value Name field.
 * 2) In the Data Type field, select REG_DWORD and choose OK.
 * 3) In the Data Field, type 4410. Select the Hex option and choose OK.

NOTE: SizReqBuf has the following range and default setting:

Range: 512 to 65535 bytes (decimal)

Default: 4356 (decimal)
 * 1) Quit REGEDT32.EXE.
 * 2) Shut down Windows NT and turn off your computer.
 * 3) Restart your computer and Windows NT.

The server should now have enough resources to process the number of SMB commands that it receives. If the errors continue, increase the value to a maximum of 0xffff (hex) or 65535 (decimal).

Additional query words: prodnt

Keywords: kbnetwork KB136150

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