Hi, First of all please ask questions regarding the use of Qt on interest@qt-project.org - Use developm...@qt-project.org only if you want to e.g. propose a fix. I took the liberty to move the thread there. Some comments below.
> -----Original Message----- > From: development-bounces+kai.koehne=digia....@qt-project.org > [mailto:development-bounces+kai.koehne=digia....@qt-project.org] On > Behalf Of ??? > Sent: Saturday, May 11, 2013 9:12 AM > To: developm...@qt-project.org > Subject: [Development] When debugging an application (using visual studio), > Failed to load platform plugin "windows". Available platforms are: > > [...] > > In normal condition, When I press F5 (Start Debugging) in Visual Studio, it > will > start an new debug instance, loading all dependent Qt dlls and plugins from > $(QTDIR). The ‘platforms’ folder is located at $(QTDIR)\plugins. I don’t copy > it > to my application’s folder, but it can find the plugins. > Qt tries to search for plugins in the QT directory, except if you specify a qt.conf file along your .exe, or have used QApplication::addLibraryPath() or QApplication::setLibraryPaths(). Double-check that you haven't added e.g. a qt.conf by accident/during tests. You should check whether - the loading of plugins fails only when debugging (e.g. does 'Run' work normally?) - if the latter, that the Qt installation indeed contains debug versions (Xd.dll) of the plugins. > > But sometimes things go bad. When I press F5 (Start Debugging), it can find > Qt dlls like Qt5Guid.dll,Qt5Quickd.dll, and so on from $(QTDIR)\bin, but can’t > find plugins from $(QTDIR)\plugins > > When it can’t find the plugin, this condition will last long time. In general you can try to run your application in 'depends.exe' (Profile mode), though I don't know whether you can embed this in your VS debugging setup. Also, you might want to set the QT_DEBUG_PLUGINS environment variable to a value, and then check the output when running your application. > > And I copied the QtDir to another machine then it works well there. This is only supported if you have exactly the same directory structure, or use qt.conf. > > > What may the problem be? In normal condition, what mechanism do Qt use > to find these plugins when debugging a program? http://qt-project.org/doc/qt-5.0/qtdoc/deployment-plugins.html > I guess QtVSAddin is handling these. So is it a Bug of QtVSAddin ? I doubt that the QtVSAddin does anything in this context. There should be nothing special about debugging, except maybe that the debug version of your application / the Qt libs and plugins are used. Regards Kai _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
