.NET Winforms app dies on startup - c#

I have a .NET Winforms app written in C# which works everywhere but on one particular machine. On that machine it dies without ever starting. There is no error message, but the following is written to the event log:
Type: Error
Source: .NET Runtime 2.0 Error Reporting
Description: Faulting application myapp.exe, version 4.2.0.0, stamp 4bcf05d0, faulting module kernel32.dll, version 5.2.3790.4480, stamp 49c51f0a, debug? 0, fault address 0x0000bef7.
There doesn't seem to be anything odd about that machine - it is one of a number of clones created with VSphere, and doesn't exhibit any other issues. The other clones run my app without any problem. It is Windows Server 2003 SP2 with .NET Framework 3.5 SP1, running Citrix, which was reinstalled after the clone to take the new name (as were the other clones).
Any advice on how to diagnose or trap the issue?
Also, I am soon going to release a new version of my app, is there anything I can do to the new version to give more information on this kind of problem?
EDIT: Thank you all for your answers, unfortunately the sysadmins for the machine decided to just rebuild it from scratch, and the problem went away. So I'll probably never know what the problem was.

Install Debugging tools for Windows on that machine, and use WinDbg to launch your application. Then it should tell what exceptions happen.

If the error is related to environment (such as missing assembly) then the app will not reach a point where you can trap & log it.
I would create a new console application and then load such app into new AppDomain and run it with ExecuteAssembly. If the errors are .NET exceptions you will be able to catch them and write to a console window.

Is your MyApp.Exe.Config a correct XML file? Open it in Visual Studio, and see if there are any errors against the XML format.

Related

Is There Such A Thinig As a C# Application Link Map Or Something Equivalent?

Is is there a C# build construct available that would allow me to create a link map containing symbols and offsets? I need to debug an application that is throwing an exception when running scheduled out of Task Scheduler.
Here are some details of what is going on: I have developed a C# application on Windows 10 Workstation (non-server). I am trying to run this application on Windows Server 2012 R2, which, like the Windows 10 system, has .net framework 4.5.1 installed.
The application runs with no known errors on the development workstation, whether it is run installed or out of Visual Studio 2012.
However, the application will not run at its scheduled time out of Windows Task Scheduler. This is the error 0xE0434352 -- I have been reading SuperUser and stackOverflow posts about this error -- and the Windows application event log shows an exception has occurred.
However, the offsets in the application event log are not a lot of help without having a map of the executable.
Is creating a link map or equivalent possible?
Here is a link to one description of a linker map for gcc.
in .Net the assemblies are self-describing. A debug database file is useful, but not necessary to describe the objects and how the code is structured. So I would not think a link map are relevant for .net assemblies.
You might want to take a look at dnSpy, this is a combined de-compiler, debugger and assembly editor. It is often useful when trying to debug errors. It is however limited to managed code, so it will probably be less useful if the error is in native code.

App is not starting after being published

Here is my problem:
I've created a little app to communicate with a server, nothing much particular. I'd like to publish it so I can give the app to my friends but after being published, I click the setup, it asks me to install, and after a few seconds, closes and nothing happens.
I've tried to "publish" the app with a Setup project, it installs and when I try to open the app, nothing happens.
I looked for solutions but nothing worked for me. Do you have any ideas?
The programm is under Visual Studio 2019, .NET 4.7.2
This could be related to different reasons, like lack of runtime ( .NET framework runtime ) on target machines or application behavior as well ( you did not tell much about it).
You could use some logging framework like NLogger or Log4Net to save in a log file at least critical errors and warnings so that you could see on target machine directly what the issues are.
in general if you properly used a setup project that should make sure your installer checks for dependencies like .NET runtime and also creates a desktop shortcut,
if you are publishing via ClickOnce you can easily specify in there to create a desktop icon and to include or download pre-requisites during installation phase.
Are you sure the issue is not related to exception handling and some failure happens when application started and tried to communicate with your server and for whatever network setting or reason fails to do so and then silently crashes?
If you try to connect to the server at the initialization of your program (form_load, etc.), it can happen when the connecting to the server fails. The whole application waits to reach a timeout, which may be 30 seconds long. Please check this scenario. See if the server is available and connectable.

.NET Runtime Error Event Id 1026

I have a WPF application I have created on a Windows 8.1 machine targeting .NET runtime 4.5.1. It runs fine on the development machine.
I am trying to install it on a Windows 7 machine. It has .Net 4.5.1 installed. When I try to run it on the Windows 7 Machine the login window comes up. When I enter the password, the application verifies the password then it crashes. I have verified that it is connecting to the server to verify the password...so it's not a SQL Connection error.
So it appears that it happens when the main application windows is trying to display. Here is the info that gets recorded in the Application log. Notice the framework version. The app is targeting 4.5.1. So I don't understand why it is showing 4.0.30319.
Application: HardwarResources.WPF.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.Data.Core.EntityCommandExecutionException
Stack:
at System.Windows.Window.ShowDialog()
at HardwareResources.WPF.MainEntry.Main(System.String[])
The only other pertinent information is Event ID: 1026.
HELP!
I had the same problem when I copied the .exe file (Debug or Release) to another machine and it would simply not work! Showed up in task manager for a few seconds and would disappear leaving only an ArgumentOutOfRangeException and a Kernelbase.dll error in the application event logs. So I decided to install Visual Studio on the machine where the file would not launch. After copying the project folder to a different file structure than on the original machine and hitting compiling it, I found out that I was trying to cut a string (file path) shorter than it was (due to different file structure). So the problem was in the code itself and NOT in any .dlls or .NET versions.
Hope I have helped!
Try adding an event handler to AppDomain.CurrentDomain.UnhandledException to trace more detail about the error. See here for reference on catching unhandled exceptions.
I'm thinking it's something to do with cross-threading, thread synchronization context (requiring invoke) or perhaps missing [STAThread] attribute on Main.
If you're trying to feed data to a dialog, you have to go about it in a thread-safe manner.

WPF application is not starting up when changing Active solution platform from Any CPU to x86

I am working on a WPF application.
Which is running fine with "Any CPU" as Active solution platform, but when it is changed to "x86" application starts but stoping without showing up any form or error message.
Application neither throws any exception nor logging any error in event log.
I am running this application on .NET 4.0 framework and Windows 7 64 bit OS.
appreciate your help to solve this issue.
Thanks,
maxk
First off, it's strange that you don't get any error messages. Not even when you launch the built application without debugger?
The best answer anyone can give based on the information provided, is to do some trial and error debugging:
1) Create a new empty project, set it to x86, see if it runs. If not, there is some serious problems with your machine setup, you'll probably have to reinstall.
2) In your own project, if you have any external references start removing them one by one and see if your app starts to run. Maybe a referenced dll is causing havoc in 32-bit mode.
3) Start commenting out blocks of code to see if your app starts to run then. I've found out that having errors in Window_Loaded methods (especially while debugging) can cause problems - exceptions not being handled, application crashing etc.
4) Could be that you have a bad Visual Studio plugin (I assume you are using VS and problems are occuring on your development machine). Try running the app without debugging...
5) Create a virtual machine and try your app in there, if it works there, then your machine is somehow "corrupted"..
PS! Just for your information, because you are running a 64-bit OS, then the Any CPU setting causes your app to be 64-bit. Forcing it to be 32-bit can cause problems if you are using badly written native dlls (although it's usually the other way round - problems occuring when going to 64-bit from 32-bit).

C# WinForms App won't run on Win7 after Building

I have a program that I built that reads and writes files. I built it in Release mode, then tried to run the exe on Win7. At first, with troubleshooting on, Windows simply told me the application closed and it was looking for a solution. After a few seconds, the dialog would disappear and show nothing more.
So with some significant effort I got the debugger attached to the process, but it was only showing me disassembly, which tells me that the error taking place wasn't in my application code, but in the framework somewhere.
The strange thing is that when I let the debugger attach, then press "stop" in VS, and exit the debugger, the program actually runs at that point!
So now I'm stumped. I have an application that builds, that seems to be having a permission error when I run it, but if I let the debugger attach then close it, it runs, and there's no Exception to really look at.
How I troubleshoot this issue?
Edit: Responding to Merlyn:
It's a custom app written from scratch in c#. The only dependency it has outside of core .NET namespaces is the Ionic.Zip DLL.
Visual Studio 2008 (Writing in C# 3.5)
Windows 7 - Home Premium, v6.1 build 7600
CPU - x64 quad core
CPU are you compiling under: Any CPU
I haven't tried it on another machine or a different version of VS.
Edit: I was able to try the compiled version on another win7 computer, and it worked without issue, so it looks like a security (?) issue on my computer only.
Try it in the debugger with Just My Code disabled and Native Code enabled, then check the call stack.
Also, what happens if you run it directly in Visual Studio?
Uncheck Enable Visual Studio Hosting Process in Project Properties and see whether it still works in VS.
I'd suggest sending the issue to Microsoft support. Especially with the data given here, you will have an easy time convincing them it's their problem. You might need an MSDN subscription for that.

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