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  4. Help, How to fix the bug of "cannot load library 'xxx\QtQuick3D\qquick3dplugin.dll"?
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Help, How to fix the bug of "cannot load library 'xxx\QtQuick3D\qquick3dplugin.dll"?

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  • A Offline
    A Offline
    andrewaiyaya
    wrote on last edited by
    #1

    I got a problem, is "plugin cannot be loaded for module 'QtQuick3D'; Cannot load library 'xxx\QtQuick3D\qquick3dplugin.dll'" when open .exe which devolepment by Qt5.15.
    But I really have this dll in my application path.
    The application install on Windows platform.
    I add QDataVisualization 1.3/1.15 in my qml file.
    There is any friends can help me?

    jsulmJ 1 Reply Last reply
    0
    • A andrewaiyaya

      I got a problem, is "plugin cannot be loaded for module 'QtQuick3D'; Cannot load library 'xxx\QtQuick3D\qquick3dplugin.dll'" when open .exe which devolepment by Qt5.15.
      But I really have this dll in my application path.
      The application install on Windows platform.
      I add QDataVisualization 1.3/1.15 in my qml file.
      There is any friends can help me?

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #2

      @andrewaiyaya Run your app after setting QT_DEBUG_PLUGINS env variable and check output for more details. See https://doc.qt.io/qt-6/debug.html

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

      A 1 Reply Last reply
      0
      • jsulmJ jsulm

        @andrewaiyaya Run your app after setting QT_DEBUG_PLUGINS env variable and check output for more details. See https://doc.qt.io/qt-6/debug.html

        A Offline
        A Offline
        andrewaiyaya
        wrote on last edited by
        #3

        @jsulm The prompt message is "Cannot load library 'mypath/qquick3dplugin.dll' or 'mypath/datavisualizationqml2.dll'" after set QT_DEBUG_PLUGINS in Windows 10 system environment variables, but I find this .dll in my path.
        This problem bring after import QtDataVisualization 1.15 and use Surface3D, Surface3DSeries and HeightMapSurfaceDataProxy to show the gray value of all pixel in an image.

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        • A Offline
          A Offline
          andrewaiyaya
          wrote on last edited by
          #4

          I fixed this problem.
          I lost some Qt5Quick3D dll in my application path. this dll need use windeployqt to run qquick3dplugin.dll in cmd.

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