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Qt6 Widgets Application not working, exit code -1073741511

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  • H Offline
    H Offline
    hskoglund
    wrote on 2 May 2025, 12:09 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.

    1 Reply Last reply
    0
    • H HQ2000
      2 May 2025, 12:08

      @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.

      J Offline
      J Offline
      JonB
      wrote on 2 May 2025, 12:18 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.

      C 1 Reply Last reply 2 May 2025, 12:26
      0
      • J JonB
        2 May 2025, 12:18

        @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.

        C Offline
        C Offline
        Christian Ehrlicher
        Lifetime Qt Champion
        wrote on 2 May 2025, 12:26 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

        J 1 Reply Last reply 2 May 2025, 12:27
        1
        • C Christian Ehrlicher
          2 May 2025, 12:26

          @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.

          J Offline
          J Offline
          JonB
          wrote on 2 May 2025, 12:27 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.

          1 Reply Last reply
          0
          • H Offline
            H Offline
            HQ2000
            wrote on 2 May 2025, 13:42 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

            C 1 Reply Last reply 2 May 2025, 13:45
            0
            • H HQ2000
              2 May 2025, 13:42

              @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

              C Offline
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              Christian Ehrlicher
              Lifetime Qt Champion
              wrote on 2 May 2025, 13:45 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

              1 Reply Last reply
              1
              • H HQ2000
                1 May 2025, 20:53

                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 2 May 2025, 14:03 last edited by HQ2000 5 Feb 2025, 14:04
                #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)
                
                J 1 Reply Last reply 2 May 2025, 14:12
                0
                • H HQ2000
                  2 May 2025, 14:03

                  @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)
                  
                  J Offline
                  J Offline
                  JonB
                  wrote on 2 May 2025, 14:12 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?

                  C 1 Reply Last reply 2 May 2025, 14:13
                  0
                  • C Offline
                    C Offline
                    Christian Ehrlicher
                    Lifetime Qt Champion
                    wrote on 2 May 2025, 14:12 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

                    1 Reply Last reply
                    1
                    • J JonB
                      2 May 2025, 14:12

                      @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?

                      C Offline
                      C Offline
                      Christian Ehrlicher
                      Lifetime Qt Champion
                      wrote on 2 May 2025, 14:13 last edited by Christian Ehrlicher 5 Feb 2025, 14:14
                      #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

                      J 1 Reply Last reply 2 May 2025, 14:15
                      1
                      • C Christian Ehrlicher
                        2 May 2025, 14:13

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

                        J Offline
                        J Offline
                        JonB
                        wrote on 2 May 2025, 14:15 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.

                        C 1 Reply Last reply 2 May 2025, 14:24
                        0
                        • J JonB
                          2 May 2025, 14:15

                          @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.

                          C Offline
                          C Offline
                          Christian Ehrlicher
                          Lifetime Qt Champion
                          wrote on 2 May 2025, 14:24 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 2 May 2025, 14:37
                          1
                          • C Christian Ehrlicher
                            2 May 2025, 14:24

                            @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.

                            H Offline
                            H Offline
                            HQ2000
                            wrote on 2 May 2025, 14:37 last edited by HQ2000 5 Feb 2025, 14:37
                            #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..

                            1 Reply Last reply
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                            • C Offline
                              C Offline
                              Christian Ehrlicher
                              Lifetime Qt Champion
                              wrote on 2 May 2025, 14:38 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 2 May 2025, 14:50
                              0
                              • C Christian Ehrlicher
                                2 May 2025, 14:38

                                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 2 May 2025, 14:50 last edited by
                                #27

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

                                C 1 Reply Last reply 2 May 2025, 14:54
                                0
                                • H HQ2000
                                  2 May 2025, 14:50

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

                                  C Offline
                                  C Offline
                                  Christian Ehrlicher
                                  Lifetime Qt Champion
                                  wrote on 2 May 2025, 14:54 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 2 May 2025, 15:47
                                  0
                                  • C Christian Ehrlicher
                                    2 May 2025, 14:54

                                    @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 2 May 2025, 15:47 last edited by HQ2000 5 Feb 2025, 15:52
                                    #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

                                    C 1 Reply Last reply 2 May 2025, 15:58
                                    0
                                    • H HQ2000
                                      2 May 2025, 15:47

                                      @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

                                      C Offline
                                      C Offline
                                      Christian Ehrlicher
                                      Lifetime Qt Champion
                                      wrote on 2 May 2025, 15:58 last edited by
                                      #30

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

                                      Same with deleting the associated environment vars

                                      Then you would get an error about missing dlls. You have some wrong dlls around somewhere.
                                      Delete all dlls you copied around, don't copy dlls around in your CMakeLists.txt or anywhere else during your build, use a clean build dir, set the env var accordingly and start it from the command line where you also started the dependency tools from...

                                      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 2 May 2025, 16:15
                                      1
                                      • C Christian Ehrlicher
                                        2 May 2025, 15:58

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

                                        Same with deleting the associated environment vars

                                        Then you would get an error about missing dlls. You have some wrong dlls around somewhere.
                                        Delete all dlls you copied around, don't copy dlls around in your CMakeLists.txt or anywhere else during your build, use a clean build dir, set the env var accordingly and start it from the command line where you also started the dependency tools from...

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                                        HQ2000
                                        wrote on 2 May 2025, 16:15 last edited by HQ2000 5 Feb 2025, 16:32
                                        #31

                                        @Christian-Ehrlicher
                                        I did not copy around any DLLs, this is a clean build dir (CLion pre-config)
                                        I will try it.

                                        Added the env vars:
                                        Screenshot 2025-05-02 183208.png

                                        Still get the Error messages that exactly these ones are missing...

                                        J C 2 Replies Last reply 2 May 2025, 16:52
                                        0
                                        • H HQ2000
                                          2 May 2025, 16:15

                                          @Christian-Ehrlicher
                                          I did not copy around any DLLs, this is a clean build dir (CLion pre-config)
                                          I will try it.

                                          Added the env vars:
                                          Screenshot 2025-05-02 183208.png

                                          Still get the Error messages that exactly these ones are missing...

                                          J Offline
                                          J Offline
                                          JonB
                                          wrote on 2 May 2025, 16:52 last edited by JonB 5 Feb 2025, 16:54
                                          #32

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

                                          Added the env vars:

                                          You write that followed by a list of DLLs. What do you mean you did to what environment variable? Also you no longer list the Qt DLLs?

                                          Still get the Error messages that exactly these ones are missing...

                                          If you mean the 4 in that list are reported missing then you have not set your PATH correctly.

                                          I am lost.

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