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Could not find procedure entry point _Z9qt_assertPKcS0_i in dynamic link library

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  • C CidGianni

    Installed QT Creator 7.0.2 Windows 10 environment..
    After installation, I created a project type Application(Qt) - Qt Widgets Application -Empty window. Build qmake.
    After compiling, when running it shows the error below:
    Could not find procedure entry point _Z9qt_assertPKcS0_i in dynamic link library.
    I need help. Thanks.

    JonBJ Offline
    JonBJ Offline
    JonB
    wrote on last edited by JonB
    #2

    @CidGianni
    Hello and welcome.

    This has nothing to do with Creator, only your own program.

    Show the relevant code (looks like you were calling some qt_assert() function maybe?) and what you link with.

    Have you installed Qt (never mind Creator) correctly? How did you do so?

    Could not find procedure entry point _Z9qt_assertPKcS0_i in dynamic link library.

    Is that the whole error message? Was it not followed by stating e.g. which dynamic library?

    C 1 Reply Last reply
    0
    • JonBJ JonB

      @CidGianni
      Hello and welcome.

      This has nothing to do with Creator, only your own program.

      Show the relevant code (looks like you were calling some qt_assert() function maybe?) and what you link with.

      Have you installed Qt (never mind Creator) correctly? How did you do so?

      Could not find procedure entry point _Z9qt_assertPKcS0_i in dynamic link library.

      Is that the whole error message? Was it not followed by stating e.g. which dynamic library?

      C Offline
      C Offline
      CidGianni
      wrote on last edited by
      #3

      @JonB Hi. first of all, thanks. Yesterday I downloaded the latest Open Source version (qt-unified-windows-x64-4.4.0-online.exe) for Windows 10 x64 and just installed it without changing any recommendations. After installed, I created the first project (only one window), compiled and executed. It's my first contact with QT.

      JonBJ 1 Reply Last reply
      0
      • C CidGianni

        @JonB Hi. first of all, thanks. Yesterday I downloaded the latest Open Source version (qt-unified-windows-x64-4.4.0-online.exe) for Windows 10 x64 and just installed it without changing any recommendations. After installed, I created the first project (only one window), compiled and executed. It's my first contact with QT.

        JonBJ Offline
        JonBJ Offline
        JonB
        wrote on last edited by JonB
        #4

        @CidGianni
        I cannot help further on this. Doubtless somebody else will soon/later.
        However, you should state what kit you set up to use, e.g. MSVC (what version) or MinGW?

        1 Reply Last reply
        0
        • C Offline
          C Offline
          CidGianni
          wrote on last edited by
          #5

          Hi @JonB . I used Desktop Qt 6.3.1 MinGW 64bit. Thanks... In error message don't show dll name.

          1 Reply Last reply
          1
          • hskoglundH Online
            hskoglundH Online
            hskoglund
            wrote on last edited by
            #6

            Hi, if you try to build and run an app from Examples, say "Qt Widgets - Application Example" do you get the same error?

            1 Reply Last reply
            0
            • C Offline
              C Offline
              CidGianni
              wrote on last edited by
              #7

              Hi ... yes. Thanks.

              1 Reply Last reply
              0
              • C Offline
                C Offline
                ChrisW67
                wrote on last edited by
                #8

                @CidGianni said in Could not find procedure entry point _Z9qt_assertPKcS0_i in dynamic link library:

                After compiling, when running it shows the error below:
                Could not find procedure entry point _Z9qt_assertPKcS0_i in dynamic link library.

                After compiling, when linking. The program is never getting far enough to be executed. The symbol "_Z9qt_assertPKcS0_i" is in Qt5Core.dll or Qt5Cored.dll, so something is not good with what is being run.

                Select Rebuild from the Build menu.
                Copy and paste the output from the Compile Output pane.

                1 Reply Last reply
                1
                • C Offline
                  C Offline
                  CidGianni
                  wrote on last edited by
                  #9

                  Hi ChrisW67. Thanks your help. Follows COMPILE OUTPUT and APPLICATION OUTPUT:
                  COMPILE OUTPUT
                  15:30:55: Starting: "C:\Qt\Tools\mingw1120_64\bin\mingw32-make.exe" -j4
                  C:/Qt/Tools/mingw1120_64/bin/mingw32-make -f Makefile.Debug
                  mingw32-make[1]: Entering directory 'D:/OneDrive/00-ProjectosQTCreator/build-Janela01-Desktop_Qt_6_3_1_MinGW_64_bit-Debug'
                  mingw32-make[1]: Nothing to be done for 'first'.
                  mingw32-make[1]: Leaving directory 'D:/OneDrive/00-ProjectosQTCreator/build-Janela01-Desktop_Qt_6_3_1_MinGW_64_bit-Debug'
                  15:30:57: The process "C:\Qt\Tools\mingw1120_64\bin\mingw32-make.exe" exited normally.
                  15:30:57: Elapsed time: 00:02.
                  AFTER REBUILD
                  include/QtGui -IC:/Qt/6.3.1/mingw_64/include/QtCore -Idebug -I. -I/include -IC:/Qt/6.3.1/mingw_64/mkspecs/win32-g++ -o debug\moc_janela.o debug\moc_janela.cpp
                  g++ -Wl,-subsystem,windows -mthreads -o debug\Janela01.exe debug/main.o debug/janela.o debug/moc_janela.o C:\Qt\6.3.1\mingw_64\lib\libQt6Widgets.a C:\Qt\6.3.1\mingw_64\lib\libQt6Gui.a C:\Qt\6.3.1\mingw_64\lib\libQt6Core.a -lmingw32 C:\Qt\6.3.1\mingw_64\lib\libQt6EntryPoint.a -lshell32
                  mingw32-make[1]: Leaving directory 'D:/OneDrive/00-ProjectosQTCreator/build-Janela01-Desktop_Qt_6_3_1_MinGW_64_bit-Debug'
                  15:34:21: The process "C:\Qt\Tools\mingw1120_64\bin\mingw32-make.exe" exited normally.
                  15:34:21: Elapsed time: 00:22.

                  APPLICATION OUTPUT
                  15:30:58: Starting D:\OneDrive\00-ProjectosQTCreator\build-Janela01-Desktop_Qt_6_3_1_MinGW_64_bit-Debug\debug\Janela01.exe...
                  15:31:03: D:\OneDrive\00-ProjectosQTCreator\build-Janela01-Desktop_Qt_6_3_1_MinGW_64_bit-Debug\debug\Janela01.exe crashed.

                  15:36:35: Starting D:\OneDrive\00-ProjectosQTCreator\build-Janela01-Desktop_Qt_6_3_1_MinGW_64_bit-Debug\debug\Janela01.exe...
                  15:36:49: D:\OneDrive\00-ProjectosQTCreator\build-Janela01-Desktop_Qt_6_3_1_MinGW_64_bit-Debug\debug\Janela01.exe crashed.

                  C 1 Reply Last reply
                  0
                  • C Offline
                    C Offline
                    CidGianni
                    wrote on last edited by
                    #10

                    I copy Qt6Gui.dll and Qt6Core.dll to windows\system32. Today i remove from windows\system32. Now the message is:
                    Could not find procedure entry point _Z9qt_assertPKcS0_i in dynamic link library.
                    Qt6Gui.dll
                    Qt6Core.dll
                    DLL are in folder C:\Qt\Tools\QtCreator\bin

                    1 Reply Last reply
                    0
                    • hskoglundH Online
                      hskoglundH Online
                      hskoglund
                      wrote on last edited by
                      #11

                      Hi, the .dlls in the folder r C:\Qt\Tools\QtCreator\bin are meant to be used exclusively by Qt Creator. They usually are built with MSVC 2019, not with MingGW, and that could explain the error with the missing procedure entry point.

                      If you remove all Qt6Core.dll that you've copied, so that only 2 remains:
                      one in C:\Qt\6.3.1\mingw_64\bin and one in C:\Qt\Tools\QtCreator\bin (and they should have different sizes and dates) do you still get the same error when trying to build an app from Qt's Examples?

                      C 1 Reply Last reply
                      1
                      • C CidGianni

                        Hi ChrisW67. Thanks your help. Follows COMPILE OUTPUT and APPLICATION OUTPUT:
                        COMPILE OUTPUT
                        15:30:55: Starting: "C:\Qt\Tools\mingw1120_64\bin\mingw32-make.exe" -j4
                        C:/Qt/Tools/mingw1120_64/bin/mingw32-make -f Makefile.Debug
                        mingw32-make[1]: Entering directory 'D:/OneDrive/00-ProjectosQTCreator/build-Janela01-Desktop_Qt_6_3_1_MinGW_64_bit-Debug'
                        mingw32-make[1]: Nothing to be done for 'first'.
                        mingw32-make[1]: Leaving directory 'D:/OneDrive/00-ProjectosQTCreator/build-Janela01-Desktop_Qt_6_3_1_MinGW_64_bit-Debug'
                        15:30:57: The process "C:\Qt\Tools\mingw1120_64\bin\mingw32-make.exe" exited normally.
                        15:30:57: Elapsed time: 00:02.
                        AFTER REBUILD
                        include/QtGui -IC:/Qt/6.3.1/mingw_64/include/QtCore -Idebug -I. -I/include -IC:/Qt/6.3.1/mingw_64/mkspecs/win32-g++ -o debug\moc_janela.o debug\moc_janela.cpp
                        g++ -Wl,-subsystem,windows -mthreads -o debug\Janela01.exe debug/main.o debug/janela.o debug/moc_janela.o C:\Qt\6.3.1\mingw_64\lib\libQt6Widgets.a C:\Qt\6.3.1\mingw_64\lib\libQt6Gui.a C:\Qt\6.3.1\mingw_64\lib\libQt6Core.a -lmingw32 C:\Qt\6.3.1\mingw_64\lib\libQt6EntryPoint.a -lshell32
                        mingw32-make[1]: Leaving directory 'D:/OneDrive/00-ProjectosQTCreator/build-Janela01-Desktop_Qt_6_3_1_MinGW_64_bit-Debug'
                        15:34:21: The process "C:\Qt\Tools\mingw1120_64\bin\mingw32-make.exe" exited normally.
                        15:34:21: Elapsed time: 00:22.

                        APPLICATION OUTPUT
                        15:30:58: Starting D:\OneDrive\00-ProjectosQTCreator\build-Janela01-Desktop_Qt_6_3_1_MinGW_64_bit-Debug\debug\Janela01.exe...
                        15:31:03: D:\OneDrive\00-ProjectosQTCreator\build-Janela01-Desktop_Qt_6_3_1_MinGW_64_bit-Debug\debug\Janela01.exe crashed.

                        15:36:35: Starting D:\OneDrive\00-ProjectosQTCreator\build-Janela01-Desktop_Qt_6_3_1_MinGW_64_bit-Debug\debug\Janela01.exe...
                        15:36:49: D:\OneDrive\00-ProjectosQTCreator\build-Janela01-Desktop_Qt_6_3_1_MinGW_64_bit-Debug\debug\Janela01.exe crashed.

                        C Offline
                        C Offline
                        ChrisW67
                        wrote on last edited by
                        #12

                        @CidGianni said in Could not find procedure entry point _Z9qt_assertPKcS0_i in dynamic link library:

                        Hi ChrisW67. Thanks your help. Follows COMPILE OUTPUT and APPLICATION OUTPUT:

                        Thanks. I stand corrected, your program is compiling, linking, and then failing at run time. Mismatched DLLs, as @hskoglund is chasing, is the most likely cause.

                        C 1 Reply Last reply
                        0
                        • hskoglundH hskoglund

                          Hi, the .dlls in the folder r C:\Qt\Tools\QtCreator\bin are meant to be used exclusively by Qt Creator. They usually are built with MSVC 2019, not with MingGW, and that could explain the error with the missing procedure entry point.

                          If you remove all Qt6Core.dll that you've copied, so that only 2 remains:
                          one in C:\Qt\6.3.1\mingw_64\bin and one in C:\Qt\Tools\QtCreator\bin (and they should have different sizes and dates) do you still get the same error when trying to build an app from Qt's Examples?

                          C Offline
                          C Offline
                          CidGianni
                          wrote on last edited by
                          #13

                          @hskoglund Yes. I still get the same error when trying to build an app from Qt's. And dll there are only in two folders: C:\Qt\6.3.1\mingw_64\bin and C:\Qt\Tools\QtCreator\bin, and the have different sizes and dates too. I don't understand why they are different.

                          1 Reply Last reply
                          0
                          • C ChrisW67

                            @CidGianni said in Could not find procedure entry point _Z9qt_assertPKcS0_i in dynamic link library:

                            Hi ChrisW67. Thanks your help. Follows COMPILE OUTPUT and APPLICATION OUTPUT:

                            Thanks. I stand corrected, your program is compiling, linking, and then failing at run time. Mismatched DLLs, as @hskoglund is chasing, is the most likely cause.

                            C Offline
                            C Offline
                            CidGianni
                            wrote on last edited by
                            #14

                            @ChrisW67 said in Could not find procedure entry point _Z9qt_assertPKcS0_i in dynamic link library:

                            Thanks. I stand corrected, your program is compiling, linking, and then failing at run time. Mismatched DLLs, as @hskoglund is chasing, is the most likely cause.

                            Hi @ChrisW67 thanks. Do you have any suggestion? Thanks again.

                            JonBJ 1 Reply Last reply
                            0
                            • C CidGianni

                              @ChrisW67 said in Could not find procedure entry point _Z9qt_assertPKcS0_i in dynamic link library:

                              Thanks. I stand corrected, your program is compiling, linking, and then failing at run time. Mismatched DLLs, as @hskoglund is chasing, is the most likely cause.

                              Hi @ChrisW67 thanks. Do you have any suggestion? Thanks again.

                              JonBJ Offline
                              JonBJ Offline
                              JonB
                              wrote on last edited by
                              #15

                              @CidGianni
                              It seems likely/possible your program is finding DLLs from C:\Qt\Tools\QtCreator\bin at runtime when you need it to only find files from/look in C:\Qt\6.3.1\mingw_64\bin. They are not the same because the QtCreator ones are only for use by QtCreator.

                              I copy Qt6Gui.dll and Qt6Core.dll to windows\system32. Today i remove from windows\system32. Now the message is:
                              DLL are in folder C:\Qt\Tools\QtCreator\bin

                              Don't do such a thing if you do not know what you doing. It sounds like you have copied the wrong files. If you must do this yourself at all manually, I assume the ones in C:\Qt\6.3.1\mingw_64\bin would be the correct ones.

                              You should understand the difference between Qt Creator files, which are just for it to use, versus the Qt files your application uses.

                              1 Reply Last reply
                              0
                              • hskoglundH Online
                                hskoglundH Online
                                hskoglund
                                wrote on last edited by
                                #16

                                Hi, in addtion to what @JonB says:
                                Try not using OneDrive for storing your projects, instead create a directory somewhere on your C: drive.
                                To avoid the mixup/collision with Qt dlls, try installing a Qt5 version of MinGW, for example 5.15.2 and see if you get the same error when launching the 5.15.2 version of your app.

                                C 1 Reply Last reply
                                1
                                • hskoglundH hskoglund

                                  Hi, in addtion to what @JonB says:
                                  Try not using OneDrive for storing your projects, instead create a directory somewhere on your C: drive.
                                  To avoid the mixup/collision with Qt dlls, try installing a Qt5 version of MinGW, for example 5.15.2 and see if you get the same error when launching the 5.15.2 version of your app.

                                  C Offline
                                  C Offline
                                  CidGianni
                                  wrote on last edited by
                                  #17

                                  @hskoglund Thanks. I make test saving project in d:\QTProject, but not solve de problems. Now i uninstall QT 7.0.2 and I will try an old version.

                                  1 Reply Last reply
                                  0
                                  • C Offline
                                    C Offline
                                    ChrisW67
                                    wrote on last edited by
                                    #18

                                    Ensure that neither the installer nor your good self is adding C:\Qt\Tools\QtCreator\bin to the system PATH.

                                    C 1 Reply Last reply
                                    2
                                    • C ChrisW67

                                      Ensure that neither the installer nor your good self is adding C:\Qt\Tools\QtCreator\bin to the system PATH.

                                      C Offline
                                      C Offline
                                      CidGianni
                                      wrote on last edited by
                                      #19

                                      @ChrisW67 Thanks.

                                      1 Reply Last reply
                                      0
                                      • G Offline
                                        G Offline
                                        Grigg_23
                                        wrote on last edited by jsulm
                                        #20

                                        I have solved my issue by installing the DLL File.

                                        jsulmJ 1 Reply Last reply
                                        0
                                        • G Grigg_23

                                          I have solved my issue by installing the DLL File.

                                          jsulmJ Offline
                                          jsulmJ Offline
                                          jsulm
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #21

                                          @Grigg_23 I removed your link. Downloading and installing some DLLs from some dubious locations is not a good suggestion. I also have the impression that you post was a spam post.

                                          https://forum.qt.io/topic/113070/qt-code-of-conduct

                                          1 Reply Last reply
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