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A "Not implemented" error occurs when you run a basic source control command for a BizTalk Server 2009 project in the Visual Studio 2008 IDE that uses Visual SourceSafe 2005

You use Microsoft Visual SourceSafe 2005 in Microsoft Visual Studio 2008. In the Visual Studio IDE, you open a Microsoft BizTalk Server 2009 project. When you run a basic source control command, you receive the following error message:
Unexpected error encountered. It is recommended that you restart the application as soon as possible.
Error: Not implemented
File: vsee\pkgs\vssprovider\csolutionnodebase.cpp
Line number: 2111
For example, you receive the error message when you right-click a file and then select Check Out for Edit in Solution Explorer. However, you can still run the command successfully even though the error occurs.
This problem occurs because of an issue in the Visual SourceSafe 2005 provider.

Hotfix information

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.

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, submit a request to 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: 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.


You must have Visual Studio 2008 Service Pack 1 (SP1) installed to apply this hotfix.

Restart requirement

You do not have to restart the computer after you apply this hotfix if no instance of Visual Studio is being used.

Hotfix replacement information

This hotfix does not replace other hotfixes.

File information

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.
File nameFile versionFile sizeDateTimePlatform
Msemp.dll9.0.30729.4464411,46411-Jan- 201017:13x86
Vssprovider.dll9.0.30729.44643,140,95211-Jan- 201017:13x86
Vssproviderstub.dll9.0.30729.4464300,89611-Jan- 201017:13x86
To work around this issue, select Flat View instead of Tree View in the following command windows:
  • Pending Checkins
  • Check Out for Edit
  • Check In
  • Get
  • Undo Checkout
Note The view that you select becomes the default view.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Article ID: 977260 - Last Review: 10/07/2011 14:59:00 - Revision: 2.0

Microsoft Visual Studio 2008 Service Pack 1, Microsoft Visual SourceSafe 2005 Standard Edition, Microsoft BizTalk Server 2009 Branch, Microsoft BizTalk Server 2009 Developer, Microsoft BizTalk Server 2009 Enterprise, Microsoft BizTalk Server 2009 Standard

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