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QSqlDatabase: QMYSQL driver not loaded

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  • O Offline
    O Offline
    ollarch
    wrote on 13 Jul 2021, 11:52 last edited by
    #4

    Check if your path points to your bin and lib directories of your MySQL installation.

    J 1 Reply Last reply 13 Jul 2021, 11:56
    0
    • O ollarch
      13 Jul 2021, 11:52

      Check if your path points to your bin and lib directories of your MySQL installation.

      J Offline
      J Offline
      jsulm
      Lifetime Qt Champion
      wrote on 13 Jul 2021, 11:56 last edited by
      #5

      @ollarch said in QSqlDatabase: QMYSQL driver not loaded:

      MySQL installation

      This is not relevant here, as it is about deployed application which should contain everything needed (including MySQL client driver lib).

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

      S 1 Reply Last reply 13 Jul 2021, 12:15
      0
      • K KroMignon
        13 Jul 2021, 11:41

        @SPlatten said in QSqlDatabase: QMYSQL driver not loaded:

        I launch the application with exactly the same command line parameters that I do when running within Qt Creator. What do I need to do in order for it to find the QMYSQL driver?

        Have you verified that the mysql c/c++ connector shared library is provided with your installer?

        S Offline
        S Offline
        SPlatten
        wrote on 13 Jul 2021, 12:13 last edited by
        #6

        @KroMignon, how?

        Kind Regards,
        Sy

        K 1 Reply Last reply 13 Jul 2021, 12:29
        0
        • J jsulm
          13 Jul 2021, 11:56

          @ollarch said in QSqlDatabase: QMYSQL driver not loaded:

          MySQL installation

          This is not relevant here, as it is about deployed application which should contain everything needed (including MySQL client driver lib).

          S Offline
          S Offline
          SPlatten
          wrote on 13 Jul 2021, 12:15 last edited by
          #7

          @jsulm , in the .\install\sqldrivers\ there is qsqlmysql.dll

          Kind Regards,
          Sy

          J 1 Reply Last reply 13 Jul 2021, 12:17
          0
          • S SPlatten
            13 Jul 2021, 12:15

            @jsulm , in the .\install\sqldrivers\ there is qsqlmysql.dll

            J Offline
            J Offline
            jsulm
            Lifetime Qt Champion
            wrote on 13 Jul 2021, 12:17 last edited by
            #8

            @SPlatten I'm talking about MySQL client driver, not the Qt MySQL plug-in.
            Please do what I suggested, this will save us time guessing what the problem could be...

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

            1 Reply Last reply
            0
            • J jsulm
              13 Jul 2021, 11:33

              @SPlatten said in QSqlDatabase: QMYSQL driver not loaded:

              What do I need to do in order for it to find the QMYSQL driver?

              Search in the forum - this is asked again and again and again.
              Set QT_DEBUG_PLUGINS before starting your app and check output (https://doc.qt.io/qt-5/debug.html).

              S Offline
              S Offline
              SPlatten
              wrote on 13 Jul 2021, 12:17 last edited by SPlatten
              #9

              @jsulm , I now see:

              Cannot load library C:\Users\simon.platten\Documents\install\sqldrivers\qsqlmysql.dll: The specified module could not be found.
              

              How do I get the deployment tool to add the mysql connector/c 6.1 if that is whats required?

              Kind Regards,
              Sy

              J 1 Reply Last reply 13 Jul 2021, 12:19
              0
              • S SPlatten
                13 Jul 2021, 12:17

                @jsulm , I now see:

                Cannot load library C:\Users\simon.platten\Documents\install\sqldrivers\qsqlmysql.dll: The specified module could not be found.
                

                How do I get the deployment tool to add the mysql connector/c 6.1 if that is whats required?

                J Offline
                J Offline
                jsulm
                Lifetime Qt Champion
                wrote on 13 Jul 2021, 12:19 last edited by jsulm
                #10

                @SPlatten said in QSqlDatabase: QMYSQL driver not loaded:

                I now see

                Is there something above this error? Usually the problem is not qsqlmysql.dll but missing MySQL client library which is used by qsqlmysql.dll. Please post the whole output.

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

                S 1 Reply Last reply 13 Jul 2021, 12:21
                0
                • J jsulm
                  13 Jul 2021, 12:19

                  @SPlatten said in QSqlDatabase: QMYSQL driver not loaded:

                  I now see

                  Is there something above this error? Usually the problem is not qsqlmysql.dll but missing MySQL client library which is used by qsqlmysql.dll. Please post the whole output.

                  S Offline
                  S Offline
                  SPlatten
                  wrote on 13 Jul 2021, 12:21 last edited by
                  #11

                  @jsulm , thank you, here is the full output:

                  QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/simon.platten/Documents/install/platforms" ...
                  QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/platforms/qwindows.dll"
                  Found metadata in lib C:/Users/simon.platten/Documents/install/platforms/qwindows.dll, metadata=
                  {
                      "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                      "MetaData": {
                          "Keys": [
                              "windows"
                          ]
                      },
                      "className": "QWindowsIntegrationPlugin",
                      "debug": false,
                      "version": 329986
                  }
                   
                   
                  Got keys from plugin meta data ("windows")
                  loaded library "C:/Users/simon.platten/Documents/install/platforms/qwindows.dll"
                  QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/simon.platten/Documents/install/platformthemes" ...
                  QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/simon.platten/Documents/install/styles" ...
                  Chelton - Training Server
                  QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/simon.platten/Documents/install/imageformats" ...
                  QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qgif.dll"
                  Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qgif.dll, metadata=
                  {
                      "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                      "MetaData": {
                          "Keys": [
                              "gif"
                          ],
                          "MimeTypes": [
                             "image/gif"
                          ]
                      },
                      "className": "QGifPlugin",
                      "debug": false,
                      "version": 329986
                  }
                   
                   
                  Got keys from plugin meta data ("gif")
                  QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qicns.dll"
                  Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qicns.dll, metadata=
                  {
                      "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                      "MetaData": {
                          "Keys": [
                              "icns"
                          ],
                          "MimeTypes": [
                              "image/x-icns"
                          ]
                      },
                      "className": "QICNSPlugin",
                      "debug": false,
                      "version": 329986
                  }
                   
                   
                  Got keys from plugin meta data ("icns")
                  QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qico.dll"
                  Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qico.dll, metadata=
                  {
                      "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                      "MetaData": {
                          "Keys": [
                              "ico",
                              "cur"
                          ],
                          "MimeTypes": [
                              "image/vnd.microsoft.icon"
                          ]
                      },
                      "className": "QICOPlugin",
                      "debug": false,
                      "version": 329986
                  }
                   
                   
                  Got keys from plugin meta data ("ico", "cur")
                  QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qjpeg.dll"
                  Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qjpeg.dll, metadata=
                  {
                      "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                      "MetaData": {
                          "Keys": [
                              "jpg",
                              "jpeg"
                          ],
                          "MimeTypes": [
                              "image/jpeg",
                              "image/jpeg"
                          ]
                      },
                      "className": "QJpegPlugin",
                      "debug": false,
                      "version": 329986
                  }
                   
                   
                  Got keys from plugin meta data ("jpg", "jpeg")
                  QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qsvg.dll"
                  Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qsvg.dll, metadata=
                  {
                      "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                      "MetaData": {
                          "Keys": [
                              "svg",
                              "svgz"
                          ],
                          "MimeTypes": [
                              "image/svg+xml",
                              "image/svg+xml-compressed"
                          ]
                      },
                      "className": "QSvgPlugin",
                      "debug": false,
                      "version": 329986
                  }
                   
                   
                  Got keys from plugin meta data ("svg", "svgz")
                  QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qtga.dll"
                  Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qtga.dll, metadata=
                  {
                      "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                      "MetaData": {
                          "Keys": [
                              "tga"
                          ],
                          "MimeTypes": [
                              "image/x-tga"
                          ]
                      },
                      "className": "QTgaPlugin",
                      "debug": false,
                      "version": 329986
                  }
                   
                   
                  Got keys from plugin meta data ("tga")
                  QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qtiff.dll"
                  Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qtiff.dll, metadata=
                  {
                      "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                      "MetaData": {
                          "Keys": [
                              "tiff",
                              "tif"
                          ],
                          "MimeTypes": [
                              "image/tiff",
                              "image/tiff"
                          ]
                      },
                      "className": "QTiffPlugin",
                      "debug": false,
                      "version": 329986
                  }
                   
                   
                  Got keys from plugin meta data ("tiff", "tif")
                  QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qwbmp.dll"
                  Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qwbmp.dll, metadata=
                  {
                      "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                      "MetaData": {
                          "Keys": [
                              "wbmp"
                          ],
                          "MimeTypes": [
                              "image/vnd.wap.wbmp"
                          ]
                      },
                      "className": "QWbmpPlugin",
                      "debug": false,
                      "version": 329986
                  }
                   
                   
                  Got keys from plugin meta data ("wbmp")
                  QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qwebp.dll"
                  Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qwebp.dll, metadata=
                  {
                      "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                      "MetaData": {
                          "Keys": [
                              "webp"
                          ],
                          "MimeTypes": [
                              "image/webp"
                          ]
                      },
                      "className": "QWebpPlugin",
                      "debug": false,
                      "version": 329986
                  }
                   
                   
                  Got keys from plugin meta data ("webp")
                  loaded library "C:/Users/simon.platten/Documents/install/imageformats/qgif.dll"
                  loaded library "C:/Users/simon.platten/Documents/install/imageformats/qicns.dll"
                  loaded library "C:/Users/simon.platten/Documents/install/imageformats/qico.dll"
                  loaded library "C:/Users/simon.platten/Documents/install/imageformats/qjpeg.dll"
                  loaded library "C:/Users/simon.platten/Documents/install/imageformats/qsvg.dll"
                  loaded library "C:/Users/simon.platten/Documents/install/imageformats/qtga.dll"
                  loaded library "C:/Users/simon.platten/Documents/install/imageformats/qtiff.dll"
                  loaded library "C:/Users/simon.platten/Documents/install/imageformats/qwbmp.dll"
                  loaded library "C:/Users/simon.platten/Documents/install/imageformats/qwebp.dll"
                  QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/simon.platten/Documents/install/accessible" ...
                  QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/simon.platten/Documents/install/sqldrivers" ...
                  QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/sqldrivers/qsqlite.dll"
                  Found metadata in lib C:/Users/simon.platten/Documents/install/sqldrivers/qsqlite.dll, metadata=
                  {
                      "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                      "MetaData": {
                          "Keys": [
                              "QSQLITE"
                          ]
                      },
                      "className": "QSQLiteDriverPlugin",
                      "debug": false,
                      "version": 329986
                  }
                   
                   
                  Got keys from plugin meta data ("QSQLITE")
                  QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/sqldrivers/qsqlmysql.dll"
                  Found metadata in lib C:/Users/simon.platten/Documents/install/sqldrivers/qsqlmysql.dll, metadata=
                  {
                      "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                      "MetaData": {
                          "Keys": [
                              "QMYSQL3",
                              "QMYSQL"
                          ]
                      },
                      "className": "QMYSQLDriverPlugin",
                      "debug": false,
                      "version": 329986
                  }
                   
                   
                  Got keys from plugin meta data ("QMYSQL3", "QMYSQL")
                  QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/sqldrivers/qsqlodbc.dll"
                  Found metadata in lib C:/Users/simon.platten/Documents/install/sqldrivers/qsqlodbc.dll, metadata=
                  {
                      "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                      "MetaData": {
                          "Keys": [
                              "QODBC3",
                              "QODBC"
                          ]
                      },
                      "className": "QODBCDriverPlugin",
                      "debug": false,
                      "version": 329986
                  }
                   
                   
                  Got keys from plugin meta data ("QODBC3", "QODBC")
                  QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/sqldrivers/qsqlpsql.dll"
                  Found metadata in lib C:/Users/simon.platten/Documents/install/sqldrivers/qsqlpsql.dll, metadata=
                  {
                      "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                      "MetaData": {
                          "Keys": [
                              "QPSQL7",
                              "QPSQL"
                          ]
                      },
                      "className": "QPSQLDriverPlugin",
                      "debug": false,
                      "version": 329986
                  }
                   
                   
                  Got keys from plugin meta data ("QPSQL7", "QPSQL")
                  Cannot load library C:\Users\simon.platten\Documents\install\sqldrivers\qsqlmysql.dll: The specified module could not be found.
                  QLibraryPrivate::loadPlugin failed on "C:/Users/simon.platten/Documents/install/sqldrivers/qsqlmysql.dll" : "Cannot load library C:\\Users\\simon.platten\\Documents\\install\\sqldrivers\\qsqlmysql.dll: The specified module could not be found."
                  QSqlDatabase: QMYSQL driver not loaded
                  QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QODBC QODBC3 QPSQL QPSQL7
                  QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/simon.platten/Documents/install/accessiblebridge" ...
                  QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qgif.dll"
                  QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qicns.dll"
                  QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qico.dll"
                  QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qjpeg.dll"
                  QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qsvg.dll"
                  QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qtga.dll"
                  QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qtiff.dll"
                  QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qwbmp.dll"
                  QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qwebp.dll"
                  QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/platforms/qwindows.dll"
                  

                  Kind Regards,
                  Sy

                  J 1 Reply Last reply 13 Jul 2021, 12:26
                  0
                  • S SPlatten
                    13 Jul 2021, 12:21

                    @jsulm , thank you, here is the full output:

                    QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/simon.platten/Documents/install/platforms" ...
                    QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/platforms/qwindows.dll"
                    Found metadata in lib C:/Users/simon.platten/Documents/install/platforms/qwindows.dll, metadata=
                    {
                        "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                        "MetaData": {
                            "Keys": [
                                "windows"
                            ]
                        },
                        "className": "QWindowsIntegrationPlugin",
                        "debug": false,
                        "version": 329986
                    }
                     
                     
                    Got keys from plugin meta data ("windows")
                    loaded library "C:/Users/simon.platten/Documents/install/platforms/qwindows.dll"
                    QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/simon.platten/Documents/install/platformthemes" ...
                    QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/simon.platten/Documents/install/styles" ...
                    Chelton - Training Server
                    QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/simon.platten/Documents/install/imageformats" ...
                    QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qgif.dll"
                    Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qgif.dll, metadata=
                    {
                        "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                        "MetaData": {
                            "Keys": [
                                "gif"
                            ],
                            "MimeTypes": [
                               "image/gif"
                            ]
                        },
                        "className": "QGifPlugin",
                        "debug": false,
                        "version": 329986
                    }
                     
                     
                    Got keys from plugin meta data ("gif")
                    QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qicns.dll"
                    Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qicns.dll, metadata=
                    {
                        "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                        "MetaData": {
                            "Keys": [
                                "icns"
                            ],
                            "MimeTypes": [
                                "image/x-icns"
                            ]
                        },
                        "className": "QICNSPlugin",
                        "debug": false,
                        "version": 329986
                    }
                     
                     
                    Got keys from plugin meta data ("icns")
                    QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qico.dll"
                    Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qico.dll, metadata=
                    {
                        "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                        "MetaData": {
                            "Keys": [
                                "ico",
                                "cur"
                            ],
                            "MimeTypes": [
                                "image/vnd.microsoft.icon"
                            ]
                        },
                        "className": "QICOPlugin",
                        "debug": false,
                        "version": 329986
                    }
                     
                     
                    Got keys from plugin meta data ("ico", "cur")
                    QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qjpeg.dll"
                    Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qjpeg.dll, metadata=
                    {
                        "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                        "MetaData": {
                            "Keys": [
                                "jpg",
                                "jpeg"
                            ],
                            "MimeTypes": [
                                "image/jpeg",
                                "image/jpeg"
                            ]
                        },
                        "className": "QJpegPlugin",
                        "debug": false,
                        "version": 329986
                    }
                     
                     
                    Got keys from plugin meta data ("jpg", "jpeg")
                    QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qsvg.dll"
                    Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qsvg.dll, metadata=
                    {
                        "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                        "MetaData": {
                            "Keys": [
                                "svg",
                                "svgz"
                            ],
                            "MimeTypes": [
                                "image/svg+xml",
                                "image/svg+xml-compressed"
                            ]
                        },
                        "className": "QSvgPlugin",
                        "debug": false,
                        "version": 329986
                    }
                     
                     
                    Got keys from plugin meta data ("svg", "svgz")
                    QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qtga.dll"
                    Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qtga.dll, metadata=
                    {
                        "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                        "MetaData": {
                            "Keys": [
                                "tga"
                            ],
                            "MimeTypes": [
                                "image/x-tga"
                            ]
                        },
                        "className": "QTgaPlugin",
                        "debug": false,
                        "version": 329986
                    }
                     
                     
                    Got keys from plugin meta data ("tga")
                    QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qtiff.dll"
                    Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qtiff.dll, metadata=
                    {
                        "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                        "MetaData": {
                            "Keys": [
                                "tiff",
                                "tif"
                            ],
                            "MimeTypes": [
                                "image/tiff",
                                "image/tiff"
                            ]
                        },
                        "className": "QTiffPlugin",
                        "debug": false,
                        "version": 329986
                    }
                     
                     
                    Got keys from plugin meta data ("tiff", "tif")
                    QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qwbmp.dll"
                    Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qwbmp.dll, metadata=
                    {
                        "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                        "MetaData": {
                            "Keys": [
                                "wbmp"
                            ],
                            "MimeTypes": [
                                "image/vnd.wap.wbmp"
                            ]
                        },
                        "className": "QWbmpPlugin",
                        "debug": false,
                        "version": 329986
                    }
                     
                     
                    Got keys from plugin meta data ("wbmp")
                    QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/imageformats/qwebp.dll"
                    Found metadata in lib C:/Users/simon.platten/Documents/install/imageformats/qwebp.dll, metadata=
                    {
                        "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                        "MetaData": {
                            "Keys": [
                                "webp"
                            ],
                            "MimeTypes": [
                                "image/webp"
                            ]
                        },
                        "className": "QWebpPlugin",
                        "debug": false,
                        "version": 329986
                    }
                     
                     
                    Got keys from plugin meta data ("webp")
                    loaded library "C:/Users/simon.platten/Documents/install/imageformats/qgif.dll"
                    loaded library "C:/Users/simon.platten/Documents/install/imageformats/qicns.dll"
                    loaded library "C:/Users/simon.platten/Documents/install/imageformats/qico.dll"
                    loaded library "C:/Users/simon.platten/Documents/install/imageformats/qjpeg.dll"
                    loaded library "C:/Users/simon.platten/Documents/install/imageformats/qsvg.dll"
                    loaded library "C:/Users/simon.platten/Documents/install/imageformats/qtga.dll"
                    loaded library "C:/Users/simon.platten/Documents/install/imageformats/qtiff.dll"
                    loaded library "C:/Users/simon.platten/Documents/install/imageformats/qwbmp.dll"
                    loaded library "C:/Users/simon.platten/Documents/install/imageformats/qwebp.dll"
                    QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/simon.platten/Documents/install/accessible" ...
                    QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/simon.platten/Documents/install/sqldrivers" ...
                    QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/sqldrivers/qsqlite.dll"
                    Found metadata in lib C:/Users/simon.platten/Documents/install/sqldrivers/qsqlite.dll, metadata=
                    {
                        "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                        "MetaData": {
                            "Keys": [
                                "QSQLITE"
                            ]
                        },
                        "className": "QSQLiteDriverPlugin",
                        "debug": false,
                        "version": 329986
                    }
                     
                     
                    Got keys from plugin meta data ("QSQLITE")
                    QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/sqldrivers/qsqlmysql.dll"
                    Found metadata in lib C:/Users/simon.platten/Documents/install/sqldrivers/qsqlmysql.dll, metadata=
                    {
                        "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                        "MetaData": {
                            "Keys": [
                                "QMYSQL3",
                                "QMYSQL"
                            ]
                        },
                        "className": "QMYSQLDriverPlugin",
                        "debug": false,
                        "version": 329986
                    }
                     
                     
                    Got keys from plugin meta data ("QMYSQL3", "QMYSQL")
                    QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/sqldrivers/qsqlodbc.dll"
                    Found metadata in lib C:/Users/simon.platten/Documents/install/sqldrivers/qsqlodbc.dll, metadata=
                    {
                        "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                        "MetaData": {
                            "Keys": [
                                "QODBC3",
                                "QODBC"
                            ]
                        },
                        "className": "QODBCDriverPlugin",
                        "debug": false,
                        "version": 329986
                    }
                     
                     
                    Got keys from plugin meta data ("QODBC3", "QODBC")
                    QFactoryLoader::QFactoryLoader() looking at "C:/Users/simon.platten/Documents/install/sqldrivers/qsqlpsql.dll"
                    Found metadata in lib C:/Users/simon.platten/Documents/install/sqldrivers/qsqlpsql.dll, metadata=
                    {
                        "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                        "MetaData": {
                            "Keys": [
                                "QPSQL7",
                                "QPSQL"
                            ]
                        },
                        "className": "QPSQLDriverPlugin",
                        "debug": false,
                        "version": 329986
                    }
                     
                     
                    Got keys from plugin meta data ("QPSQL7", "QPSQL")
                    Cannot load library C:\Users\simon.platten\Documents\install\sqldrivers\qsqlmysql.dll: The specified module could not be found.
                    QLibraryPrivate::loadPlugin failed on "C:/Users/simon.platten/Documents/install/sqldrivers/qsqlmysql.dll" : "Cannot load library C:\\Users\\simon.platten\\Documents\\install\\sqldrivers\\qsqlmysql.dll: The specified module could not be found."
                    QSqlDatabase: QMYSQL driver not loaded
                    QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QODBC QODBC3 QPSQL QPSQL7
                    QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/simon.platten/Documents/install/accessiblebridge" ...
                    QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qgif.dll"
                    QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qicns.dll"
                    QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qico.dll"
                    QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qjpeg.dll"
                    QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qsvg.dll"
                    QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qtga.dll"
                    QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qtiff.dll"
                    QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qwbmp.dll"
                    QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/imageformats/qwebp.dll"
                    QLibraryPrivate::unload succeeded on "C:/Users/simon.platten/Documents/install/platforms/qwindows.dll"
                    
                    J Offline
                    J Offline
                    jsulm
                    Lifetime Qt Champion
                    wrote on 13 Jul 2021, 12:26 last edited by
                    #12

                    @SPlatten said in QSqlDatabase: QMYSQL driver not loaded:

                    C:\Users\simon.platten\Documents\install\sqldrivers\qsqlmysql.dll

                    Does it exist?

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

                    S 1 Reply Last reply 13 Jul 2021, 12:29
                    0
                    • S SPlatten
                      13 Jul 2021, 12:13

                      @KroMignon, how?

                      K Offline
                      K Offline
                      KroMignon
                      wrote on 13 Jul 2021, 12:29 last edited by KroMignon
                      #13

                      @SPlatten said in QSqlDatabase: QMYSQL driver not loaded:

                      how?

                      is libmysql.dll (which is the mysql connector/c DLL) available in your installation?

                      It is an old maxim of mine that when you have excluded the impossible, whatever remains, however improbable, must be the truth. (Sherlock Holmes)

                      S 1 Reply Last reply 13 Jul 2021, 12:30
                      0
                      • J jsulm
                        13 Jul 2021, 12:26

                        @SPlatten said in QSqlDatabase: QMYSQL driver not loaded:

                        C:\Users\simon.platten\Documents\install\sqldrivers\qsqlmysql.dll

                        Does it exist?

                        S Offline
                        S Offline
                        SPlatten
                        wrote on 13 Jul 2021, 12:29 last edited by
                        #14

                        @jsulm , yes, it's 100% there.

                        Kind Regards,
                        Sy

                        J 1 Reply Last reply 13 Jul 2021, 12:30
                        0
                        • S SPlatten
                          13 Jul 2021, 12:29

                          @jsulm , yes, it's 100% there.

                          J Offline
                          J Offline
                          jsulm
                          Lifetime Qt Champion
                          wrote on 13 Jul 2021, 12:30 last edited by
                          #15

                          @SPlatten Then probably libmysql.dll is missing

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

                          1 Reply Last reply
                          0
                          • K KroMignon
                            13 Jul 2021, 12:29

                            @SPlatten said in QSqlDatabase: QMYSQL driver not loaded:

                            how?

                            is libmysql.dll (which is the mysql connector/c DLL) available in your installation?

                            S Offline
                            S Offline
                            SPlatten
                            wrote on 13 Jul 2021, 12:30 last edited by SPlatten
                            #16

                            @KroMignon I don't see it, but how on the same system does it work in Qt Creator?

                            I found libmariadb.dll in **C:\Program Files (x86)\MariaDB 10.5\lib\**, should I copy that to the install folder?

                            Just tried that, still same problem.

                            Kind Regards,
                            Sy

                            J K 3 Replies Last reply 13 Jul 2021, 12:32
                            0
                            • S SPlatten
                              13 Jul 2021, 12:30

                              @KroMignon I don't see it, but how on the same system does it work in Qt Creator?

                              I found libmariadb.dll in **C:\Program Files (x86)\MariaDB 10.5\lib\**, should I copy that to the install folder?

                              Just tried that, still same problem.

                              J Offline
                              J Offline
                              jsulm
                              Lifetime Qt Champion
                              wrote on 13 Jul 2021, 12:32 last edited by
                              #17

                              @SPlatten said in QSqlDatabase: QMYSQL driver not loaded:

                              but how on the same system does it work in Qt Creator?

                              QtCreator prepares the environment before it starts your app.

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

                              S 1 Reply Last reply 13 Jul 2021, 12:33
                              0
                              • J jsulm
                                13 Jul 2021, 12:32

                                @SPlatten said in QSqlDatabase: QMYSQL driver not loaded:

                                but how on the same system does it work in Qt Creator?

                                QtCreator prepares the environment before it starts your app.

                                S Offline
                                S Offline
                                SPlatten
                                wrote on 13 Jul 2021, 12:33 last edited by SPlatten
                                #18

                                @jsulm , please see edited reply to @KroMignon...

                                Now its working, found libmysql.dll in C:\Program Files (x86)\MySQL\MySQL Connector C 6.1\lib copied to install folder, now it works!

                                Thank you for your help!

                                Kind Regards,
                                Sy

                                1 Reply Last reply
                                0
                                • S SPlatten
                                  13 Jul 2021, 12:30

                                  @KroMignon I don't see it, but how on the same system does it work in Qt Creator?

                                  I found libmariadb.dll in **C:\Program Files (x86)\MariaDB 10.5\lib\**, should I copy that to the install folder?

                                  Just tried that, still same problem.

                                  J Offline
                                  J Offline
                                  jsulm
                                  Lifetime Qt Champion
                                  wrote on 13 Jul 2021, 12:34 last edited by
                                  #19

                                  @SPlatten said in QSqlDatabase: QMYSQL driver not loaded:

                                  should I copy that to the install folder?

                                  Put it next to qsqlmysql.dll (in C:\Users\simon.platten\Documents\install\sqldrivers)

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

                                  1 Reply Last reply
                                  0
                                  • S SPlatten
                                    13 Jul 2021, 12:30

                                    @KroMignon I don't see it, but how on the same system does it work in Qt Creator?

                                    I found libmariadb.dll in **C:\Program Files (x86)\MariaDB 10.5\lib\**, should I copy that to the install folder?

                                    Just tried that, still same problem.

                                    K Offline
                                    K Offline
                                    KroMignon
                                    wrote on 13 Jul 2021, 12:36 last edited by
                                    #20

                                    @SPlatten said in QSqlDatabase: QMYSQL driver not loaded:

                                    I don't see it, but how on the same system does it work in Qt Creator? I found libmariadb.dll in **C:\Program Files (x86)\MariaDB 10.5\lib**, should I copy that to the install folder?

                                    Perhaps the easiest way would be to use dependency walker to see which DLL are required for your mysql plugin sqldrivers/qsqlmysql.dll

                                    I don't know how you have build the plugin.
                                    You could try to copy the DLL into the plugin path, so it will be reachable. But be sure it is the right one!

                                    It is an old maxim of mine that when you have excluded the impossible, whatever remains, however improbable, must be the truth. (Sherlock Holmes)

                                    1 Reply Last reply
                                    0

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                                    13 Jul 2021, 12:29

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