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QFileDialog problem: Entry Point Not Found

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  • R Offline
    R Offline
    RolBri
    wrote on last edited by
    #3

    Yes,
    all files are in one folder and the folder I use on all computers is the same.

    mrjjM 1 Reply Last reply
    0
    • R RolBri

      Yes,
      all files are in one folder and the folder I use on all computers is the same.

      mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by
      #4

      @RolBri
      Ok.
      I would use something like
      http://www.dependencywalker.com/
      and make 100% sure its not loading a DLL i dont expect.
      (on the pc that says "Entry Point Not Found")

      It must somehow get wrong version of DLL.

      1 Reply Last reply
      3
      • R Offline
        R Offline
        RolBri
        wrote on last edited by
        #5

        @mrjj

        Thank you very much.
        I used the tool you named on both windows versions.
        It always says for the "Qt5Core.dll" that the link checksum (0x0050195F) differs from the real checksum(0x005007C4).
        This is the only dll were this happens. The version of e.g. Qt5Gui.dll is the same as the version of Qt5Core.dll.
        I do not have any other Qt5Core.dll with a correct checksum.

        The tool also says that it cannot fine some other DLLs like API-MS-WIN-CORE_WINRT-L1-1-0.DLL but this is the same for all computers and only on computer it gives the error.

        So I still have no clue :-(

        mrjjM 1 Reply Last reply
        0
        • R RolBri

          @mrjj

          Thank you very much.
          I used the tool you named on both windows versions.
          It always says for the "Qt5Core.dll" that the link checksum (0x0050195F) differs from the real checksum(0x005007C4).
          This is the only dll were this happens. The version of e.g. Qt5Gui.dll is the same as the version of Qt5Core.dll.
          I do not have any other Qt5Core.dll with a correct checksum.

          The tool also says that it cannot fine some other DLLs like API-MS-WIN-CORE_WINRT-L1-1-0.DLL but this is the same for all computers and only on computer it gives the error.

          So I still have no clue :-(

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by
          #6

          @RolBri
          so all DLLS was loaded from your deploy folder?
          (on the error pc)

          1 Reply Last reply
          0
          • Chris KawaC Offline
            Chris KawaC Offline
            Chris Kawa
            Lifetime Qt Champion
            wrote on last edited by
            #7

            It always says for the "Qt5Core.dll" that the link checksum (0x0050195F) differs from the real checksum(0x005007C4).

            This means that the file you linked to when you built your app and the one that is linked when it runs are different.
            Run dependency walker in profile mode to see exact paths the dlls are loaded from.
            If you're sure you haven't mixed dlls from different Qt builds then the file might simply be corrupted. It could be damaged in transfer or something is messing with it on the target machine.

            1 Reply Last reply
            2
            • R Offline
              R Offline
              RolBri
              wrote on last edited by
              #8

              It is really strange.
              I now checked the absolut paths and the correct dll is loaded from the correct path.

              It is just that the checksum is always wrong on all machines.
              So it seems that my Qt5Core.dll is corrupted.

              I tried other software too.
              On the Win7 Enterprise machines everything works fine, but on the one Win 7 Professional machine I always get the error.

              Is there a way to rebuild Qt5Core.dll on Windows?
              Or what else can I try?

              Thanks :-)

              JKSHJ 1 Reply Last reply
              0
              • R RolBri

                It is really strange.
                I now checked the absolut paths and the correct dll is loaded from the correct path.

                It is just that the checksum is always wrong on all machines.
                So it seems that my Qt5Core.dll is corrupted.

                I tried other software too.
                On the Win7 Enterprise machines everything works fine, but on the one Win 7 Professional machine I always get the error.

                Is there a way to rebuild Qt5Core.dll on Windows?
                Or what else can I try?

                Thanks :-)

                JKSHJ Offline
                JKSHJ Offline
                JKSH
                Moderators
                wrote on last edited by
                #9

                @RolBri said:

                I now checked the absolut paths and the correct dll is loaded from the correct path.

                It is just that the checksum is always wrong on all machines.

                1. What happens if you delete Qt5Core.dll from your Windows 7 Pro machine? Do you get the same error message, or a different one?
                2. What compiler did you use?
                3. What happens if you copy Qt5Core.dll from your Win 7 Enterprise machine to your Windows 7 Pro machine?

                Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

                1 Reply Last reply
                2
                • R Offline
                  R Offline
                  RolBri
                  wrote on last edited by RolBri
                  #10

                  If I delete the Qt5Core.dll the software does not even start and I immediately get the message that the DLL is missing.

                  I used Qt 5.5.0 x64 with MinGw 5.1.0.

                  I always used the DLLs delivered with my Qt distribution.

                  Another software also using Qt5Core.dll works fine on the Win 7 Pro machine.
                  The difference is really that this software does not use a QFileDialog which somehow leads to the error :-(

                  Edit:
                  I checked it again.
                  The following line leads to the error message:

                      filename = QFileDialog::getOpenFileName(this, tr("Open File"), "C://", "Text File (*.txt);;CSV (*.csv);;");
                  
                  

                  If I comment this line and set a static filename instead the software works fine :-/

                  1 Reply Last reply
                  0
                  • R Offline
                    R Offline
                    RolBri
                    wrote on last edited by
                    #11

                    I solved the problem!

                    It was not caused by Qt.
                    The reason was a Dell specific software.
                    I just had to delete the "Backup and Restore" software from the computer and immediately the Qt software worked fine :-)

                    For more information see here:

                    https://bugreports.qt.io/browse/QTBUG-41416
                    http://en.community.dell.com/support-forums/software-os/f/3526/t/19634253

                    Thank you all very much for the help :-)

                    1 Reply Last reply
                    1
                    • mrjjM Offline
                      mrjjM Offline
                      mrjj
                      Lifetime Qt Champion
                      wrote on last edited by
                      #12

                      That was really sneaky :)
                      Thank you for reporting back.

                      1 Reply Last reply
                      1

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