Microsoft small business knowledge base

Article ID: 921310 - Last Review: January 17, 2015 - Revision: 2.2

This article has been archived. It is offered "as is" and will no longer be updated.


When you try to convert source control or the work item tracking repository from Microsoft Visual SourceSafe or from IBM Rational ClearQuest to Microsoft Visual Studio 2005 Team Foundation Server, the conversion process may fail, and you may receive the following error message:
Message: TF26174: Team Foundation timed out trying to connect to the server. Check that you have a network connection and that the Team Foundation Server is available. If the problem persists, contact your Team Foundation Server administrator.
Typically, you may experience this problem when the repository that you are converting is very large.


This problem occurs because the converter takes more time to convert the repository than the standard Microsoft Internet Information Services (IIS) application pool worker process recycling setting. In this scenario, Web services are restarted, and the converter cannot connect to the Visual Studio Team Foundation Server.


To work around this problem, use one of the following methods:
  • Disable application pool worker recycling in IIS when you run the converter.
  • Set the IIS application pool worker process to recycle based on idle time.
  • Perform an incremental migration. For more information, visit the following Microsoft Developer Network (MSDN) Web site: (
For more information about how to configure application pool recycling, visit the following Microsoft TechNet Web site: (
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.

  • Microsoft Visual Studio 2005 Team System Team Foundation:
kbnosurvey kbarchive kbtshoot kbprb KB921310
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