You Receive an Access Violation in the Dllhost.exe Process When the Network Cable Is Unplugged

This article was previously published under Q326433
This article has been archived. It is offered "as is" and will no longer be updated.
When you start a COM+ application with the network cable to your computer unplugged, you may receive an access violation (AV) that is caused by heap corruption. With PageHeap enabled, the AV occurs in COMSVCS!COMMON_IP_BuildAddressVector.
The AV only occurs when the only IP address of the computer is the local host IP (

Service Pack Information

To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack

Hotfix Information

A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows 2000 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

To work around this issue, install the Microsoft Loop Back Adapter. However, note that this installation does not fix the problem for all computers.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

This problem was first corrected in Microsoft Windows 2000 Service Pack 4.
For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:
265173 The Datacenter Program and Windows 2000 Datacenter Server Product
For additional information about how to install multiple hotfixes with only one restart, click the article number below to view the article in the Microsoft Knowledge Base:
296861 Use QChain.exe to Install Multiple Hotfixes with Only One Reboot

Article ID: 326433 - Last Review: 10/26/2013 17:22:13 - Revision: 2.2

Microsoft COM+ 1.0

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