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Article ID: 905628 - Last Review: October 9, 2011 - Revision: 3.0

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SYMPTOMS

When you run a custom Winsock network program on a Microsoft Windows XP Service Pack 2 (SP2)-based computer, you receive the following error message:
Error 10055 = WSAENOBUFS
An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full.
Note The error message that you receive may be different depending on the program that you are using.

This symptom occurs if the Windows XP SP2-based computer does not have network connectivity.

RESOLUTION

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:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
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. 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.
   Date         Time   Version        Size     File name
   --------------------------------------------------------
   15-Aug-2005  23:58  5.1.2600.2739  360,576  Tcpip.sys
   15-Aug-2005  23:46  5.1.2600.2739   30,720  Arpidfix.exe
To work around this problem, install the Microsoft Loopback Adapter.

To install the Microsoft Loopback Adapter, follow these steps:
  1. Click Start, and then click Control Panel.
  2. If you are in Classic view, click Switch to Category View.
  3. Click Printers and Other Hardware.
  4. Click Add Hardware, and then click Next.
  5. Click Yes, I have already connected the hardware, and then click Next.
  6. Click Add a new hardware device, and then click Next.
  7. Click Install the hardware that I manually select from a list, and then click Next.
  8. Click Network adapters, and then click Next.
  9. In the Manufacturer box, click Microsoft.
  10. In the Network Adapter box, click Microsoft Loopback Adapter, and then click Next two times.
  11. Click Finish.
Note After you install the Microsoft Loopback Adapter, you can manually configure its options. If the TCP/IP properties are configured to use the Dynamic Host Configuration Protocol (DHCP), the Microsoft Loopback Adapter eventually uses an autonet address (169.254.x.x/16). The Microsoft Loopback Adapter eventually uses an autonet address because the adapter is not actually connected to physical media. By default, TCP/IP properties are configured to use DHCP.

STATUS

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

MORE INFORMATION

This problem occurs in the custom Winsock network program when you try to join the computer to a multicast group. Specifically, this problem occurs if you try to join the computer to a multicast group by adding a multicast address on the network adaptor. The error message is generated when you call the Winsock setsockopt function with the IP_ADD_MEMBERSHIP option. The error message is generated even though you have disabled the Media Sense feature in Windows XP.

For more information about the standard terminology that is used to describe Microsoft software updates, click the following article number to view the article in the Microsoft Knowledge Base:
824684  (http://support.microsoft.com/kb/824684/ ) Description of the standard terminology that is used to describe Microsoft software updates
Keywords: 
kbautohotfix kbqfe kbHotfixServer kbwinxpsp2fix kbfix kbbug KB905628
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