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Failed to load platform plugin "windows".
MByte last edited by A Former User
I built Qt5 64-bit with -platform win32-msvc2012 -opengl es2 -angle <path> on Windows 8.
Whenever I try to compile and run a Qt program, I get the following error:
@Failed to load platform plugin "windows".
Available platforms are:
If I build without ANGLE support, it works, but I need ANGLE to use OpenGL shaders.
It wasn't doing this before, but now it seems to happen no matter what. I've tried a number of qt5 repository pulls from different dates, different ANGLE repository pulls... even a fresh install of Windows and I still get the same error.
I traced a debug build, and it sees the platform plugin, but it seems that LoadLibrary is failing when trying to load it. Any ideas how to resolve this?
MByte last edited by
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.
Macro last edited by
MrNoway last edited by
it's the "libEGLd.dll" not the "libEGL.dll"
but thanks, this was puzzling me.
napajejenunedk0 last edited by
Which library depends on libEGL? libGLES or Qt5Widgets, Qt5Gui? Since, using Dependency Walker, neither my Qt 5 application's executable, nor the libraries it depends on, depend on libEGL. I presume it is loaded dynamically.
napajejenunedk0 last edited by
I've found that it is qwindows.dll platform plugin that depends on libEGL.
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:
I also included qwindowsd.dll.
Can someone help?
goblincoding last edited by
See "this thread":http://qt-project.org/forums/viewthread/27056/#122634 for a list of dll's and folder structure.
It helped me! The problem was in folder structure.
Thank you very much!
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
I solved that already (sent in previous email :)), but thanks anyway!
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
mphair last edited by
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.
- Look at what DLLs are loaded when you run the code in QT-Creator.
- The DLLs must be for the sytem you are running, that is 32 OR 64 bit; the right version.
- 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.
[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
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?
He wrote it :)
MaxteN last edited by
Worked for me after I did the following:
- include "$(QTDIR)\include\QtANGLE" to the project
- include "libEGL.dll" in the .exe directory (libEGLd.dll if debug)
- put "qwindows.dll" in "platforms\qwindows.dll"
bq. See this thread [qt-project.org] for a list of dll’s and folder structure.bq.
Filip9322 last edited by
Dave W last edited by
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!!!!!!