CODEWITHSUNDEEP
c++windowsqt
Demat
Demat

Reputation: 39

Qt platform plugin "windows" is not found on one computer

I have an application built with Qt 5.5, deployed and running on x86 Windows 7 with dynamic linking. When I try to launch it on that particular computer, I get the following error:

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

Available platform plugins are: minimal, offscreen, windows, windows.

Reinstalling the application may fix the problem.

The "windows" plugin is indeed repeated twice in the list.

Though I have the libraries set up properly, such that they run without an issue on my main computer, here, the platforms directory doesn't seem to be found.

File list:

MyProject\platforms\qwindows.dll
MyProject\Qt5Core.dll
MyProject\Qt5Cored.dll
MyProject\Qt5Gui.dll
MyProject\Qt5Guid.dll
MyProject\Qt5Widgets.dll
MyProject\Qt5Widgetsd.dll
MyProject\MyProject.exe

Many similar questions can be found about this error, but I have tried all the answers I have found about it (including changing file and folder names, adding various extra Qt libraries to the directory, etc.) without success. I have built the application again while making sure that all components have the right architecture, again without success.

Other than static linking, how can I make it run?

Upvotes: 0

Views: 3591

Answers (4)

Mahdi Khalili
Mahdi Khalili

Reputation: 1188

Open Cmd and write this for qtquick deployment (remove --qmldir for non qtquick):

 windeployqt --qmldir <path-to-app-qml-files> <path-to-app-binary>

For example: 

windeployqt --qmldir C:\Users\Administrator\Documents\Dyn
amicView C:\Users\Administrator\Documents\build-DynamicView-vc-Release\release

Write windeployqt for more details.

Upvotes: 0

Jim G.
Jim G.

Reputation: 15365

Setting the QT_QPA_PLATFORM_PLUGIN_PATH environment variable worked for me.

This solution was also mentioned here and here.

Upvotes: 0

user1590232
user1590232

Reputation:

Try to use windeployqt. It'll try to autocollect all needed libraries.

Upvotes: 0

Vladimir Bershov
Vladimir Bershov

Reputation: 2832

You need to put the folder 'platforms' from the \$QTDIR\$version\$complier\plugins\ (which must contains the files qwindows.dll and qminimal.dll) near your .exe file.

Usual list of dlls for Qt 5 on Windows:

enter image description here

Upvotes: 2

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