c# - .net Framework Error (HRESULT 0x8007000B)

Question

I have a C# application which was written on a 32bit windows XP machine with Visual Studio 2005. The application runs fine on Windows XP machines, however when I try to run it on a 64bit Windows 7 professional machine, I get the following dialog-box on start up:

Here is the full text from the details.

  See the end of this message for details on invoking 
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.BadImageFormatException: An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)
   at ICSNeoCSharp.IcsNeoDll.icsneoTxMessages(Int32 hObject, IcsSpyMessage& pMsg, Int32 lNetworkID, Int32 lNumMessages)
   at ICSNeoCSharp.FormDTCApplication.transmitFlowControl(Int32 myArbID) in C:Documents and SettingsAdministratorDesktopAdam Stuff ThinkPadDTC Checker FINALfrmDTCApp.cs:line 1750
   at ICSNeoCSharp.FormDTCApplication.flowControlTimer_Tick(Object sender, EventArgs e) in C:Documents and SettingsAdministratorDesktopAdam Stuff ThinkPadDTC Checker FINALfrmDTCApp.cs:line 5166
   at System.Windows.Forms.Timer.OnTick(EventArgs e)
   at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


************** Loaded Assemblies **************
mscorlib
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.5472 (Win7SP1GDR.050727-5400)
    CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v2.0.50727/mscorlib.dll
----------------------------------------
DTC Checker V1.0
    Assembly Version: 1.0.4960.25549
    Win32 Version: 1.0.4960.25549
    CodeBase: file:///C:/DTC%20Checker%20V1.0%20R3/DTC%20Checker%20V1.0%20R3.exe
----------------------------------------
System.Windows.Forms
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.5468 (Win7SP1GDR.050727-5400)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.5467 (Win7SP1GDR.050727-5400)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Drawing
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.5467 (Win7SP1GDR.050727-5400)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
Microsoft.Office.Interop.Excel
    Assembly Version: 12.0.0.0
    Win32 Version: 12.0.6600.1000
    CodeBase: file:///C:/Windows/assembly/GAC/Microsoft.Office.Interop.Excel/12.0.0.0__71e9bce111e9429c/Microsoft.Office.Interop.Excel.dll
----------------------------------------

************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.

For example:

<configuration>
    <system.windows.forms jitDebugging="true" />
</configuration>

When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.

Has anyone else encountered this error and succeeded in solving it?

Answer 1

While your main app might be built for AnyCPU are you sure all the assemblies are AnyCPU? Do you have any native assemblies or assemblies that contain native code? Are they built against x86?

file:///C:/Windows/Microsoft.NET/Framework64/v2.0.50727/mscorlib.dll

This tells me that the app is running as an x64 process but it would appear that there is some assembly that isn't AnyCPU or x64 which is likely the cause of the BadImageFormatException.

One thing you can try is to run the application from a 32-bit command prompt (c:windowsSysWow64cmd.exe) to force it to be a 32-bit process and see if that works. If that works then there is definitely some assembly that is not AnyCPU.