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Qt6 Widgets Application not working, exit code -1073741511

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  • Christian EhrlicherC 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.

    H Offline
    H Offline
    HQ2000
    wrote on last edited by HQ2000
    #10

    @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:

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    • Christian EhrlicherC Offline
      Christian EhrlicherC Offline
      Christian Ehrlicher
      Lifetime Qt Champion
      wrote on last edited by
      #11

      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.

      Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
      Visit the Qt Academy at https://academy.qt.io/catalog

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      • H Offline
        H Offline
        HQ2000
        wrote on last edited by HQ2000
        #12

        @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.

        JonBJ 1 Reply Last reply
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        • hskoglundH Offline
          hskoglundH Offline
          hskoglund
          wrote on last edited by
          #13

          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.

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          • H 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.

            JonBJ Offline
            JonBJ Offline
            JonB
            wrote on last edited by
            #14

            @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 EhrlicherC 1 Reply Last reply
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            • JonBJ 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 EhrlicherC Offline
              Christian EhrlicherC Offline
              Christian Ehrlicher
              Lifetime Qt Champion
              wrote on last edited by
              #15

              @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.

              Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
              Visit the Qt Academy at https://academy.qt.io/catalog

              JonBJ 1 Reply Last reply
              1
              • Christian EhrlicherC 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.

                JonBJ Offline
                JonBJ Offline
                JonB
                wrote on last edited by
                #16

                @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.

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                • H Offline
                  H Offline
                  HQ2000
                  wrote on last edited by
                  #17

                  @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 EhrlicherC 1 Reply Last reply
                  0
                  • H 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 EhrlicherC Offline
                    Christian EhrlicherC Offline
                    Christian Ehrlicher
                    Lifetime Qt Champion
                    wrote on last edited by
                    #18

                    @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.

                    Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
                    Visit the Qt Academy at https://academy.qt.io/catalog

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                    • H HQ2000

                      Hello everyone!

                      I'm trying to get into programming with Qt6 on desktop using Qt Widgets and I have run into a problem: Whenever I build and run my code, I get the following output:

                      Process finished with exit code -1073741511 (0xC0000139)
                      

                      Of course, mostly that's due to an incorrect setup up, but I have previously managed to successfully run the sample Qt program provided by the IDE. I checked the tutorial I used for the setup and it seems like it should work - but it doesn't.

                      -- Additional Information --

                      • Tutorial I used
                      • OS: Windows 11 Home
                      • IDE: CLion 2025.1
                      • Build System: CMake (+ ninja)
                      • Qt Installation: 6.9.0
                      • Qt Directory: C:\Qt
                      • Project Name: CPS
                      • CMakeLists.txt file:
                      cmake_minimum_required(VERSION 3.31)
                      project(CPS)
                      
                      set(CMAKE_CXX_STANDARD 17)
                      set(CMAKE_AUTOMOC ON)
                      set(CMAKE_AUTORCC ON)
                      set(CMAKE_AUTOUIC ON)
                      
                      set(CMAKE_PREFIX_PATH "C:/Qt/6.9.0/mingw_64")
                      
                      find_package(Qt6 COMPONENTS
                              Core
                              Gui
                              Widgets
                              REQUIRED)
                      
                      add_executable(CPS main.cpp)
                      target_link_libraries(CPS
                              Qt::Core
                              Qt::Gui
                              Qt::Widgets
                      )
                      
                      if (WIN32 AND NOT DEFINED CMAKE_TOOLCHAIN_FILE)
                          set(DEBUG_SUFFIX)
                          if (MSVC AND CMAKE_BUILD_TYPE MATCHES "Debug")
                              set(DEBUG_SUFFIX "d")
                          endif ()
                          set(QT_INSTALL_PATH "${CMAKE_PREFIX_PATH}")
                          if (NOT EXISTS "${QT_INSTALL_PATH}/bin")
                              set(QT_INSTALL_PATH "${QT_INSTALL_PATH}/..")
                              if (NOT EXISTS "${QT_INSTALL_PATH}/bin")
                                  set(QT_INSTALL_PATH "${QT_INSTALL_PATH}/..")
                              endif ()
                          endif ()
                          if (EXISTS "${QT_INSTALL_PATH}/plugins/platforms/qwindows${DEBUG_SUFFIX}.dll")
                              add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
                                      COMMAND ${CMAKE_COMMAND} -E make_directory
                                      "$<TARGET_FILE_DIR:${PROJECT_NAME}>/plugins/platforms/")
                              add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
                                      COMMAND ${CMAKE_COMMAND} -E copy
                                      "${QT_INSTALL_PATH}/plugins/platforms/qwindows${DEBUG_SUFFIX}.dll"
                                      "$<TARGET_FILE_DIR:${PROJECT_NAME}>/plugins/platforms/")
                          endif ()
                          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)
                      endif ()
                      

                      Note: the CMake "code" at the end isn't directly relevant, it's standard since this isn't Qt creator.

                      • main.cpp file:
                      #include <QApplication>
                      #include <QPushButton>
                      
                      int main(int argc, char *argv[]) {
                          QApplication a(argc, argv);
                          QPushButton button("Hello world!", nullptr);
                          button.resize(200, 100);
                          button.show();
                          return QApplication::exec();
                      }
                      

                      Note: this the unchanged example project which is working under correct circumtances.

                      Potential Errors
                      • Path variable: I added "C:\Qt\Tools\mingw64\bin" and "C:\Qt\6.9.0\mingw_64\bin" to the System Path variable
                      • CMake Prefix Path: Set correctly, see Qt path and CMakeLists.txt file

                      If there's a piece of information I missed, tell me and I will add it.

                      Thanks in advance
                      HQ2000

                      H Offline
                      H Offline
                      HQ2000
                      wrote on last edited by HQ2000
                      #19

                      @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)
                      
                      JonBJ 1 Reply Last reply
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                      • H 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)
                        
                        JonBJ Offline
                        JonBJ Offline
                        JonB
                        wrote on last edited by
                        #20

                        @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 EhrlicherC 1 Reply Last reply
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                        • Christian EhrlicherC Offline
                          Christian EhrlicherC Offline
                          Christian Ehrlicher
                          Lifetime Qt Champion
                          wrote on last edited by
                          #21

                          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

                          Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
                          Visit the Qt Academy at https://academy.qt.io/catalog

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                          • JonBJ 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 EhrlicherC Offline
                            Christian EhrlicherC Offline
                            Christian Ehrlicher
                            Lifetime Qt Champion
                            wrote on last edited by Christian Ehrlicher
                            #22

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

                            Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
                            Visit the Qt Academy at https://academy.qt.io/catalog

                            JonBJ 1 Reply Last reply
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                            • Christian EhrlicherC Christian Ehrlicher

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

                              JonBJ Offline
                              JonBJ Offline
                              JonB
                              wrote on last edited by
                              #23

                              @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 EhrlicherC 1 Reply Last reply
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                              • JonBJ 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 EhrlicherC Offline
                                Christian EhrlicherC Offline
                                Christian Ehrlicher
                                Lifetime Qt Champion
                                wrote on last edited by
                                #24

                                @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.

                                Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
                                Visit the Qt Academy at https://academy.qt.io/catalog

                                H 1 Reply Last reply
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                                • Christian EhrlicherC 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.

                                  H Offline
                                  H Offline
                                  HQ2000
                                  wrote on last edited by HQ2000
                                  #25

                                  @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..

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                                  • Christian EhrlicherC Offline
                                    Christian EhrlicherC Offline
                                    Christian Ehrlicher
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #26

                                    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.

                                    Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
                                    Visit the Qt Academy at https://academy.qt.io/catalog

                                    H 1 Reply Last reply
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                                    • Christian EhrlicherC 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.

                                      H Offline
                                      H Offline
                                      HQ2000
                                      wrote on last edited by
                                      #27

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

                                      Christian EhrlicherC 1 Reply Last reply
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                                      • H HQ2000

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

                                        Christian EhrlicherC Offline
                                        Christian EhrlicherC Offline
                                        Christian Ehrlicher
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #28

                                        @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.

                                        Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
                                        Visit the Qt Academy at https://academy.qt.io/catalog

                                        H 1 Reply Last reply
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                                        • Christian EhrlicherC 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.

                                          H Offline
                                          H Offline
                                          HQ2000
                                          wrote on last edited by HQ2000
                                          #29

                                          @Christian-Ehrlicher
                                          Did it, nothing changed. (I restarted the project, of course)
                                          Same with deleting the associated environment vars

                                          @JonB
                                          It did. But it is not needed, I viewed it in the Dependency Walker

                                          Christian EhrlicherC 1 Reply Last reply
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