FIX: The CLR fails with a fatal execution engine error, and a crash occurs when you run an application by using the .NET Framework 2.0 Service Pack 2


The common language runtime (CLR) fails with a fatal execution engine error, and a crash occurs when you run an application by using the Microsoft .NET Framework 2.0 Service Pack 2 (SP2). For example, this problem occurs when you start World Wide Web Publishing Service (W3SVC) on a server that is running Microsoft Exchange Server 14, and then submit requests to Exchange Web Services. When this problem occurs, you may experience the following symptoms:
  • In the Windows Event Viewer, you see a ".NET Runtime" event in the Application log that includes one or more of the following:
    • Incorrectly committed to using native image for <assembly>
    • 0x80131506
  • When Fusion logging is turned on, the last Fusion log that is generated in the default category contains the following information at the end of the log:
    LOG: Found assembly by looking in the GAC.

    LOG: Binding succeeds. Returns assembly from <path of assembly>.

    LOG: Assembly is loaded in <LoadFrom or default> load context.
  • When you run the application under the Windows Debugger before the crash, you find that the CLR writes the following message to the debugger:
    Rejecting native image because dependency is not native.


If an assembly that has a native image in the global assembly cache (GAC) is loaded as a dependent bind of an assembly through the LoadFrom method for the first time, Fusion logging will correctly find the assembly. The native image is never returned to the caller, although it is recorded in the load context.


Hotfix Replacement Information

The hotfix that corresponds to KB963676 has been superseded with the hotfix KB981574, which contains all fixes that were previously included in KB963676. You should use the hotfix KB981574 to fix the issues described in KB963676. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
981574 The splash screen stays open longer than usual when you try to start Excel on a computer that has the .NET Framework 3.5 SP1 installed


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information

How to view Event Viewer in Windows Vista

  1. Click Start, and then click Control Panel.
  2. Double-click Administrative Tools, and then double-click Event Viewer.

    Note To open Event Viewer, you can also click Start, type eventvwr.exe in the search box, and then double-click Event Viewer under Programs.
  3. In the console tree, expand Windows Logs, and then select Application.

  4. In the details pane, double-click the event that you want to view.

How to turn on Fusion logging

  1. Start a Microsoft Visual Studio 2008 command prompt in Administrator mode.
  2. Type fuslogvw.exe, and then press ENTER.
  3. Click on Settings, and then click the Log all binds to disk option button.

Article ID: 963676 - Last Review: Aug 4, 2010 - Revision: 1