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Install QT Creator - failed to start - it could not load Qt Platform

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  • P Offline
    P Offline
    peter_cz
    wrote on last edited by
    #1

    Dears,

    I'd like to run QT Creator and after installing I got this Error message:

    This application failed to start because it could not find or load the Qt platform plugin "windows".

    Did you see any behaviour as this and how to fix it?

    Thanks.

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    • JohanSoloJ Offline
      JohanSoloJ Offline
      JohanSolo
      wrote on last edited by
      #2

      You should give a look at windeployqt.

      `They did not know it was impossible, so they did it.'
      -- Mark Twain

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      • P Offline
        P Offline
        peter_cz
        wrote on last edited by
        #3

        I'm not talking about deployment of any application. This just after QT Creator install, it can't get running...

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        • JohanSoloJ Offline
          JohanSoloJ Offline
          JohanSolo
          wrote on last edited by
          #4

          My bad, there are so many questions about deployment...

          What is you OS version, which "flavour" of Qt did you install, and how?

          `They did not know it was impossible, so they did it.'
          -- Mark Twain

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          • P Offline
            P Offline
            peter_cz
            wrote on last edited by
            #5

            I use Windows 7, 64bit; I use latest 5.9.1 Qt.

            mrjjM 1 Reply Last reply
            0
            • P peter_cz

              I use Windows 7, 64bit; I use latest 5.9.1 Qt.

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

              @peter_cz
              How did you install Qt ?
              Via online installer or direct download?
              Note that Creator is not Qt framework but the editor.

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              • P Offline
                P Offline
                peter_cz
                wrote on last edited by
                #7

                online installer

                jsulmJ 1 Reply Last reply
                0
                • P peter_cz

                  online installer

                  jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #8

                  @peter_cz Try to start QtCreator from a cmd.exe after setting "set QT_DEBUG_PLUGINS=1" there. Then you should see a lot of debug output which could help to find out what is going wrong.

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

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                  • P Offline
                    P Offline
                    peter_cz
                    wrote on last edited by
                    #9

                    I did:

                    cd C:\Qt\Tools\QtCreator\bin>

                    set variable as

                    C:\Qt\Tools\QtCreator\bin>set QT_DEBUG_PLUGINS=1

                    run creator as
                    C:\Qt\Tools\QtCreator\bin>qtcreator.exe

                    and no debug info and imedatelly Error message appears

                    BTW is it possible to include image to this forum as screenshot from my PC ?

                    jsulmJ 1 Reply Last reply
                    0
                    • P peter_cz

                      I did:

                      cd C:\Qt\Tools\QtCreator\bin>

                      set variable as

                      C:\Qt\Tools\QtCreator\bin>set QT_DEBUG_PLUGINS=1

                      run creator as
                      C:\Qt\Tools\QtCreator\bin>qtcreator.exe

                      and no debug info and imedatelly Error message appears

                      BTW is it possible to include image to this forum as screenshot from my PC ?

                      jsulmJ Offline
                      jsulmJ Offline
                      jsulm
                      Lifetime Qt Champion
                      wrote on last edited by
                      #10

                      @peter_cz My bad - release build will probably not show anything.
                      Image sharing is working only sporadically here. You can try.

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

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                      • P Offline
                        P Offline
                        peter_cz
                        wrote on last edited by
                        #11

                        What do I need to do to make it working on Windows 7 and supply info you need to resolve the issue?

                        mrjjM 1 Reply Last reply
                        0
                        • P peter_cz

                          What do I need to do to make it working on Windows 7 and supply info you need to resolve the issue?

                          mrjjM Offline
                          mrjjM Offline
                          mrjj
                          Lifetime Qt Champion
                          wrote on last edited by
                          #12

                          @peter_cz
                          Its pretty odd to have creator say so.
                          Normally its with deployment of apps.
                          do you use mingw or visual stud?
                          It could be the vs runtimes as they are not always installed in win 7

                          I would look at Creator.exe with
                          http://www.dependencywalker.com/

                          and see if something is missing.

                          Maybe install was damaged
                          Check your creator have the actual dll
                          alt text

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                          • P Offline
                            P Offline
                            peter_cz
                            wrote on last edited by
                            #13

                            Mine directory looks like this

                            0_1502958384616_Capture.PNG

                            and depandancy walker

                            0_1502958511610_Capture1.PNG

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                            0
                            • mrjjM Offline
                              mrjjM Offline
                              mrjj
                              Lifetime Qt Champion
                              wrote on last edited by
                              #14

                              Hi
                              It does look ok
                              And it seems that all Qt*.dlls can be loaded?

                              I wonder if something went wrong during install.

                              The installer didn't say anything?

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                              0
                              • hskoglundH Offline
                                hskoglundH Offline
                                hskoglund
                                wrote on last edited by
                                #15

                                Hi, you could try once again with set QT_DEBUG_PLUGINS=1 but this time, before you start qtcreator.exe, to see the debug output, download and start dbgview.exe

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                                • P Offline
                                  P Offline
                                  peter_cz
                                  wrote on last edited by
                                  #16

                                  please look at this thread about Application can't start because could not find or load Qt

                                  1 Reply Last reply
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