FIX: Error message when a user-defined function specifies the data source in a data-driven unit test in Visual Studio 2008 Team System: "The unit test adapter failed to connect to the data source or to read the data"
Consider the following scenario. In Microsoft Visual Studio 2008 Team System, you use a data-driven unit test. In the data-driven unit test, a user-defined function specifies the data source. In this scenario, the data-driven unit test may fail. Additionally, you may receive the following error message:
The unit test adapter failed to connect to the data source or to read the data. For more information on troubleshooting this error, see "Troubleshooting Data-Driven Unit Tests" (http://go.microsoft.com/fwlink/?LinkId=62412) in the MSDN Library.
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Visual Studio 2008 Team System service pack that contains this hotfix.
To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone 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 usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
To apply this hotfix, you must have Visual Studio 2008 Team System installed.
You do not have to restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
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 item in Control Panel.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about data-driven unit tests, visit the following Microsoft Developer Network (MSDN) Web site:
Microsoft Visual Studio Team System 2008 Team Suite, Microsoft Visual Studio Team System 2008 Team Foundation Server, Microsoft Visual Studio Team System 2008 Database Edition, Microsoft Visual Studio Team System 2008 Architecture Edition, Microsoft Visual Studio Team System 2008 Development Edition, Microsoft Visual Studio Team System 2008 Test Edition, Microsoft Visual Studio Team System 2008 Test Load Agent, Microsoft Visual Studio 2008 Standard Edition