Qt6 Widgets Application not working, exit code -1073741511

[Christian Ehrlicher]

@HQ2000 said in Qt6 Widgets Application not working, exit code -1073741511:

the correct one is used.

Then you would not get this crash. Start in a debugger and see what dlls are loaded and at which dll it is crashing.

[HQ2000]

@Christian-Ehrlicher do you have an example which one? With the standard CLion debug config I get the exit code -1
here are the loaded DLLs:

[Christian Ehrlicher]

I would either start gdb from the command line or in visual studio - esp. in Visual Studio the debugger panel shows what dlls are loaded when in a nice view. Never used CLion.

[HQ2000]

@Christian-Ehrlicher
Here are the DLLs:

• C:\Users[MyUsrName]\CLionProjects\CPS\cmake-build-debug\Qt6Core.dll
• C:\Users[MyUsrName]\CLionProjects\CPS\cmake-build-debug\Qt6Widgets.dll
• C:\Qt\6.9.0\mingw_64\bin\libgcc_s_seh-1.dll
• C:\Qt\6.9.0\mingw_64\bin\libstdc++-6.dll
• C:\WINDOWS\system32\kernel32.dll
• C:\WINDOWS\system32\MSVCRT.dll

I looked up every single one and they're all available.

[hskoglund]

Hi, another option to show what DLLs an .exe has loaded is to run ListDLLs start a CMD and type listdlls CPS

P.S. Sometimes a 3rd party antivirus can cause that error 0xC0000139, so if you have one running, try disabling it.

[JonB]

@HQ2000 said in Qt6 Widgets Application not working, exit code -1073741511:

C:\Users[MyUsrName]\CLionProjects\CPS\cmake-build-debug\Qt6Core.dll
C:\Users[MyUsrName]\CLionProjects\CPS\cmake-build-debug\Qt6Widgets.dll

Your CMakeLists.txt lists:

find_package(Qt6 COMPONENTS
        Core
        Gui
        Widgets
        REQUIRED)

So is there not at least a Qt6Gui.dll also required?

I don't know any more than: somewhere you are messed up in what you have built, where you have placed it and what is required. And I do not use Windows or MinGW.

[Christian Ehrlicher]

@JonB said in Qt6 Widgets Application not working, exit code -1073741511:

C:\Users[MyUsrName]\CLionProjects\CPS\cmake-build-debug\Qt6Core.dll
C:\Users[MyUsrName]\CLionProjects\CPS\cmake-build-debug\Qt6Widgets.dll

Why are the dlls there? Where do they come from? Normally they are used from the PATH env var.

[JonB]

@Christian-Ehrlicher I agree. I was just quoting from the OP's post. We know the OP really needs to sort out what they have where.

[HQ2000]

@JonB
@Christian-Ehrlicher
Since you both haven't worked with CLion and Qt so far (I guess), let me clarify some things:

1. Qt6Gui is required as a standard (you can change that of course) if you use CLion with Qt, so it is available for but not required by the sample program since none of its functionality is used.
2. The DLLs are there because because of the "find_package" command in the CMakeLists.txt file.

I tried to run it with gdb as @Christian-Ehrlicher told me and I was able to run it with any problems...

@hskoglund
I tried it...same error

[Christian Ehrlicher]

@HQ2000 said in Qt6 Widgets Application not working, exit code -1073741511:

The DLLs are there because because of the "find_package" command in the CMakeLists.txt file.

No, find_package() does not copy anything.

[HQ2000]

@Christian-Ehrlicher you're right, it's done here
@HQ2000 said in Qt6 Widgets Application not working, exit code -1073741511:

 foreach (QT_LIB Core Gui Widgets)
         add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
                 COMMAND ${CMAKE_COMMAND} -E copy
                 "${QT_INSTALL_PATH}/bin/Qt6${QT_LIB}${DEBUG_SUFFIX}.dll"
                 "$<TARGET_FILE_DIR:${PROJECT_NAME}>")
  endforeach (QT_LIB)

[JonB]

@HQ2000
So purely OOI could you comment on why that foreach has not copied Qt6Gui.dll as I asked earlier? However you say you know it works without that, somehow.

Confirm you are not building your project for debug?

Remove everything on your PATH environment variable so we know it is not picking something up somewhere?

[Christian Ehrlicher]

Don't do this. Adjust your PATH env var accordingly and use windeployqt when you want to deploy your app. Your are missing dll and plugins

[Christian Ehrlicher]

@JonB copying dlls around manually is wrong. The PATH env var has to be adjusted.

[JonB]

@Christian-Ehrlicher
? Of course, I know! I was just trying to diagnose where the OP's problem might lie, given what is in the makefile. I posted before your post.

[Christian Ehrlicher]

@JonB said in Qt6 Widgets Application not working, exit code -1073741511:

where the OP's problem might lie,

The problem is, that he is copying only half of the required stuff because he is doing some strang stuff manually for no reason.

[HQ2000]

@Christian-Ehrlicher so, what else should I get you? Also, the whole CMakeLists.txt file is standard in CLion. I did not write this.
Yes, I did some things manually on purpose. Private data..

[Christian Ehrlicher]

As I already wrote - don't copy stuff around as it's wrong as it's missing things. Adjust your PATH var accordingly so that the Qt libs are properly found.

[HQ2000]

@Christian-Ehrlicher
You mean I should just add their absolute paths to the PATH var?

[Christian Ehrlicher]

@HQ2000 said in Qt6 Widgets Application not working, exit code -1073741511:

You mean I should just add their absolute paths to the PATH var?

Again: add the path to the Qt dlls to the PATH env var.