Microsoft KB Archive/249721

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Knowledge Base

Article ID: 249721

Article Last Modified on 6/23/2005


  • Microsoft Internet Information Server 4.0

This article was previously published under Q249721

We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:


When connecting to ASP pages on a computer running Internet Information Server, the client may receive the following error message intermittently:

Data area passed to a system call is too small.


This error message can be caused by certain system configuration parameters.


To work around the problem, perform the following steps:

  1. In the Internet Services Manager (ISM) Microsoft Management Console (MMC), open the Web site Properties, and then click the Home Directory tab.
  2. In Application Settings, click Configuration.
  3. Click to check the Cache ISAPI Applications check box.
  4. Stop and restart the Web site.

If the problem persists, upgrade to the latest Windows NT service pack.


The error message is listed under the Windows NT error code as follows:

122L ERROR_INSUFFICIENT_BUFFER The data area passed to a system call is too small.

The same error message may appear under different circumstances. For additional information, click the article numbers below to view the articles in the Microsoft Knowledge Base:

142650 Netlogon Stops when Mailslot Message Is Larger than Specified

207523 Error Occurs During SSL Connection

155011 INFO: Error Codes in Windows NT Part 1 of 2 (article I)

Additional query words: IIS, ASP, ISAPI, buffer

Keywords: kbprb kbpending KB249721