I've a 64bit system with Win7 and I use VS2010 with .Net Framework 4.0.
In a Winform application I get an Exception from a third-party component, I'm trying to catch this exception with a Try-Catch but it doesn't work!
Why?
UPDATE
If I un-check CLR Exceptions It works properly but I'm forced to check it due to this known problem: Why the form load can't catch exception?
If I press F10 it continues entering in catch statement!!
Seems that you are using calling an unmanaged dll here. Try catching this exception using ExternalException Class. This may work for you but once you've gone outside of the .NET runtime's control, it's entirely up to the unmanaged code; there's nothing the .NET runtime can do.
Have you got the following setting unchecked:
Break when exceptions cross AppDomain or managed/native boundaries (Managed only)
in your Tools->Options->Debugging->General tab for Visual Studio 2010
Its explained in MSDN here
Related
The exception code C0000005 is thrown from mscorwks.dll when the application is run on Windows Server 2008 R2 launched using test complete. Other platforms (Windows XP, Server 2003 R2, Windows 7 32-bit and 64-bit) do not present this exception.
The event log from a single execution has many of the following event with event ID 1023 raised by the .NET Runtime:
.NET Runtime version 2.0.50727.4952 - Fatal Execution Engine Error (7383851A) (80131506)
The application itself makes use of a SOAP interface generated by Visual Studio from a WSDL file, a COM object with an embedded interop, and is targeting .NET 4.
sfc /scannow was run and found no problems with system files on the affected system.
What troubleshooting can be done to identify a solution?
Fatal Engine Execution Error and an access violation are both symptoms of the same problem. FEEE is raised when the .NET garbage collector detects that the internal structure of the garbage collected heap is destroyed. An access violation is a hardware exception, raised by the processor when it is asked to access memory with an invalid address. A common cause of an AV is heap corruption.
These kind of mishaps are very commonly caused by unmanaged code. It is also quite common for unmanaged code to have latent memory management bugs that can go unnoticed for a long time. The kind of damage the bug can do tends to be quite random. Just running it on another operating system which has a different memory allocation pattern can be enough to trigger the bomb.
You have an excellent candidate for the source of the trouble. You'll need to work with the COM server vendor or author to chase the bug.
A 0xC0000005 is an exception code wrapping a Win32 error which means "Access Denied." Given that you are using COM interop and are getting an ExecutionEngineException (in COM, COR_E_EXECUTIONENGINE; 0x80131506), my guess is that either it's a NULL pointer in the COM component or a faulty ComImport directive in your .NET code.
This error is caused by flaws in the way that TestComplete 7 interacts with the heap in mixed managed/unmanaged applications. Instead of using the TestedApp.Run method using the following block of code, modified for you choice of scripting language, presented in VBScript:
Dim oScript, command
Set oScript = CreateObject("WScript.Shell")
command = "%comspec% /c " & PATH_TO_EXE & " " & Args
oScript.Run command, 10, True
The relevant MSDN article is Run Method (Windows Script Host).
TestComplete 7 (including the latest update 7.52) supports .NET Framework 4 only up to version .NET 4 Beta 2. It does not support the release version of the Framework, so this may be the reason of the problem.
Try building the application targeting .NET 2.0. This should resolve the problem.
To test .NET 4 applications, you will need to use TestComplete 8.
When I debug ASP.NET MVC application, KeyVaultClient throws randomly exception:
Managed Debugging Assistant 'FatalExecutionEngineError' : 'The runtime has encountered a fatal error. The address of the error was at 0x59eab403, on thread 0x6098. The error code is 0xc0000005. This error may be a bug in the CLR or in the unsafe or non-verifiable portions of user code. Common sources of this bug include user marshaling errors for COM-interop or PInvoke, which may corrupt the stack.'
I use:
nuget Microsoft.Azure.KeyVault 3.0.3
Visual Studio 2019 Professional 16.1.4
Microsoft.AspNet.WebApi 5.2.3
don't have Managed Compatibility Mode
I got familiar with this question and nothing helpful happens.
Edit
After enabling Managed Compatibility Mode I get slightly different error:
Managed Debugging Assistant 'FatalExecutionEngineError' has detected a problem in 'C:\Program Files (x86)\IIS Express\iisexpress.exe'.
Additional Information: The runtime has encountered a fatal error. The address of the error was at 0x6c0db403, on thread 0x54a8. The error code is 0xc0000005. This error may be a bug in the CLR or in the unsafe or non-verifiable portions of user code. Common sources of this bug include user marshaling errors for COM-interop or PInvoke, which may corrupt the stack.
occurred
From https://devblogs.microsoft.com/devops/switching-to-managed-compatibility-mode-in-visual-studio-2013/
New managed debug engine that provides us the ability to more rapidly add new features compared to the older implementation. This can be seen by the number of features introduced in Visual Studio 2013 after only a single year including Managed Return Values, .NET 64-bit Edit and Continue, Async Callstacks Enhancements, and Improved Tasks Window to name a few. Unfortunately, there are still a couple scenarios that are not supported yet with the new debug engine, so in these cases you will have to switch back to the legacy engine.
Error which you are getting is because of the issue which is not supported by new debug engine.
Please try below setting and see if you still get the same error.
To switch back to the legacy debug engine globally, select Tools/ Options
then check Use Managed Compatibility Mode on the Debugging / General tab.
The global option will force the legacy engine to be used for any launch or attach.
Hope it helps.
I search a way to locate UnhandledException in a native c++ desktop application. The error occurs in a .net assembly that is called by in process com interop. Problems are I do not know witch assembly causes the UnhandledException and I can not reproduce on my developer machine, so I can not simply use the debugger.
I try with AppDomain.CurrentDomain.UnhandledException but I think each com call get it's own AppDomain. Whatever it does not work, app is still crashing and event is not triggered.
Also I try to use stackify prefix, but may app is not an webservice and not an windows service, so this does not work.
Event logs are written but do not point to the error.
Any idea how I could identify the assembly causing the problem?
-- Edit --
Not all assemblies used via com interop are my own, so it is not that easy to add code to all of them.
Erros in event log is:
Source: .Net Framework
ID: 1026
Message: The process was terminated on a unhandeled exception.
Errorcode c0000005
I'm looking at code that is new-to-me. I have c++ code in a project called UI, with a number of dependencies, which builds correctly and doesn't return any errors. In the same solution in Visual Studio 2008, I have created a new C# windows forms project and added a reference to the dll generated by the UI project, and added a "using" statement. What I want to do is raise one of the dialogs that are defined in the UI project, so I have code like
UIDialog uIDialog = new UIDialog();
uIDialog.Show();
which builds.
When I run my project in debug, when it gets to the "new" part, I get the exception above - with no information as to what the missing module is.
Is there any way to find out what the missing module is, without digging through the code in the UI project?
(I'm trying to rephrase this question so that it doesn't get closed. If someone could give the definitive answer of "No, there isn't" I'd find that very helpful. Thanks also to those who closed the previous version.)
Edit:
System.IO.FileNotFoundException occurred
Message="The specified module could not be found.
(Exception from HRESULT: 0x8007007E)"
Source="ui"
StackTrace:
at ui.UIDialog.Startup()
at ui.UIDialog..ctor() in c:\..\ui\UIDialog.h:line 61
InnerException:
That's the problem, there's no useful information anywhere obvious!
It's not a 32/64 bit problem - before getting here, I had the typical "BadImageFormatException", so to get past that I forced everything to be 32bit.
You could use the MSIL Disassembler on the referenced dll and check the manifest for all the dependencies of the dll. The disassembler is part of the Windows SDK tools.
Or there is always DependencyWalker, though I haven't used it in years.
You can turn on Fusion logging to see what the loader is doing and find out what's missing.
I have a user that keeps getting this error. Is there a tool that does window handle counting that i can use to figure out why he keeps getting this error.
System.ComponentModel.Win32Exception: Error creating window handle.
at System.Windows.Forms.NativeWindow.CreateHandle(CreateParams cp)
at System.Windows.Forms.Control.CreateHandle()
at System.Windows.Forms.Form.CreateHandle()
at System.Windows.Forms.Control.get_Handle()
at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)
If the Form you are creating overrides WndProc(), be careful to ensure that it always calls base.WndProc() during the window creation process.
I inadvertently omitted a call to base.WndProc() in my override, and got your stack trace.
The best counter I know is Taskmgr.exe. View + Select Columns and check "User objects", "Handle count" and "GDI Objects".
The generic diagnostic is that you're leaking handles and consumed 10,000 of them. Beware of a handle leak bug in .NET 2.0 SP1 and .NET 3.5's Graphics.CopyFromScreen(), fixed in 3.5 SP1.
Maybe this could help:
Unhandled exception Win32Exception,Error creating window handle
CLR Debugger (DbgCLR.exe)
on mine machine debugger is located at:
"c:\Program Files\Microsoft Visual Studio 8\SDK\v2.0\GuiDebug\DbgCLR.exe"