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FIX: Error message when you try to profile a Visual C++ application that is a native non-static library: "Error VSP1386 : X buffer(s) lost in association with process "<process_id>""

Consider the following scenario. You try to profile a Microsoft Visual C++ application. The Visual C++ application is a native non-static library. To do this, you use the instrumentation method in Microsoft Visual Studio Team Suite 2005. In this scenario, you may receive the following error message:
Error VSP1386 : X buffer(s) lost in association with process "process_id"
Additionally, the Visual Studio integrated development environment (IDE) may crash.

  • This problem occurs if you profile the application by using the IDE or at a command prompt.
  • If you profile the same library by using the sampling method, this problem does not occur.
This problem occurs because the library contains an import table that has some NULL values. If the profiler retrieves a NULL value from the import table, the profiler crashes when it dereferences the pointer because the profiler expects a valid pointer.

Hotfix information

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 2005 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.


You must have Visual Studio Team System 2005 Service Pack 1 installed to apply this hotfix.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global 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
Vsperf80.dll8.0.50727.1845118,78421-July- 200823:48x86
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about how to analyze application performance by using profiling tools, visit the following Microsoft Developer Network (MSDN) Web site:For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
profiler team system vc++ sampling VSP1386

Article ID: 955752 - Last Review: 09/26/2008 16:55:08 - Revision: 1.0

  • Microsoft Visual Studio 2005 Team Suite
  • kbexpertiseadvanced kbfix kbqfe kbhotfixserver KB955752