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Failed to load platform plugin "windows".

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  • D Offline
    D Offline
    d.mancic
    wrote on last edited by
    #7

    Hi people,

    I have the same problem.

    I copied .exe file in separate folder, along with many .dll files.
    On the computer where I developed the application, everything works.

    However, on the other computers there is still a message:

    ///////////////////////////////////////////////////////////////////////
    Failed to load platform plugin "windows". Available platforms are:

    (Press Retry...)
    ///////////////////////////////////////////////////////////////////////

    I also included qwindowsd.dll.

    Can someone help?

    Thank you,

    Dusan

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    0
    • G Offline
      G Offline
      goblincoding
      wrote on last edited by
      #8

      See "this thread":http://qt-project.org/forums/viewthread/27056/#122634 for a list of dll's and folder structure.

      http://www.goblincoding.com

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      0
      • D Offline
        D Offline
        d.mancic
        wrote on last edited by
        #9

        It helped me! The problem was in folder structure.

        Thank you very much!

        Dusan

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #10

          Hi,

          Have a look at the "deployment":http://qt-project.org/doc/qt-5.0/qtdoc/deployment-windows.html documentation.

          Did you put your platform plugin in the platform subdir ? (Not in the plugins subdir)

          And are you sure you want do deploy the debug version (unless it's a typo)? The debug runtime from visual studio are not redistributable.

          Hope it helps

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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          • D Offline
            D Offline
            d.mancic
            wrote on last edited by
            #11

            I solved that already (sent in previous email :)), but thanks anyway!

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            0
            • C Offline
              C Offline
              CarlStenquist
              wrote on last edited by
              #12

              THANK YOU MByte! I am using libGLESv2.dll and was having the exact same problem: The pop-up

              ..could not find or load the Qt platform plugin windows..

              when trying to run the EXE-file. I could not resolve this until adding libEGL.dll to the same folder as my .EXE.
              How is one supposed to figure this out?
              This needs be explained somewhere - It took me 4 h. to find this!
              Someone please add to QT documentation!
              Carl Stenquist, Renesas

              P.S. I'm not really a "lab rat". Just an applications engineer.

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              • M Offline
                M Offline
                mphair
                wrote on last edited by
                #13

                I still cannot solve this issue. I've added qwindows.dll and libEGL.dll and any other dll I could find and I still get the same popup error.

                1 Reply Last reply
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                • C Offline
                  C Offline
                  CarlStenquist
                  wrote on last edited by
                  #14
                  1. Look at what DLLs are loaded when you run the code in QT-Creator.
                  2. The DLLs must be for the sytem you are running, that is 32 OR 64 bit; the right version.
                  3. For my app, I needed qwindows.dll, qminimal.dll, qoffscreen.dll in a "platforms" directory under the executable.
                    But all such info seems missing in the QT documentation.
                    =Carl

                  P.S. I'm not really a "lab rat". Just an applications engineer.

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                  • JKSHJ Offline
                    JKSHJ Offline
                    JKSH
                    Moderators
                    wrote on last edited by
                    #15

                    [quote author="mphair" date="1392983929"]I still cannot solve this issue. I've added qwindows.dll and libEGL.dll and any other dll I could find and I still get the same popup error.[/quote]Hi,

                    Did you put them in the correct folders? See http://qt-project.org/wiki/Deploy_an_Application_on_Windows

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

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                    • C Offline
                      C Offline
                      CarlStenquist
                      wrote on last edited by
                      #16

                      JKSH
                      How did you find that page - other than by through a search? I cannot see a link to it on the Wiki Home page. http://qt-project.org/wiki

                      Is the page so new that it is not linked to the main page yet?
                      =Carl

                      P.S. I'm not really a "lab rat". Just an applications engineer.

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                      0
                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #17

                        He wrote it :)

                        Interested in AI ? www.idiap.ch
                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                        • M Offline
                          M Offline
                          MaxteN
                          wrote on last edited by
                          #18

                          Worked for me after I did the following:

                          1. include "$(QTDIR)\include\QtANGLE" to the project
                          2. include "libEGL.dll" in the .exe directory (libEGLd.dll if debug)
                          3. put "qwindows.dll" in "platforms\qwindows.dll"
                            bq. See this thread [qt-project.org] for a list of dll’s and folder structure.bq.

                          THANKS ALL!

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                          • M MByte

                            Actually, I found the problem. ANGLE's libEGL.dll also needed to be in the path, not just libGLESv2.dll.

                            Thanks to toothrot in IRC for having me try Dependency Walker.

                            Filip9322F Offline
                            Filip9322F Offline
                            Filip9322
                            wrote on last edited by
                            #19

                            @MByte https://www.youtube.com/watch?v=eHlDAT-haE0

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                            • D Offline
                              D Offline
                              Dave W
                              wrote on last edited by
                              #20

                              None of these solutions works on a Win 8.0 machine. I'm trying to use Harbour with QT which has proven to be nothing but a complete waste of time and effort. Countless hours spent chasing BS issues that should never exist. I have the dll's in the folders described and it does not work! In my opinion, do not waste your time with Harbour and QT. I also hate C++ so QT is not for me. I'm going back to a real development environment, .NET!!!!!!

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