Unable to find the platform plugin.

[saitej]

Hi all,

I am unable to deploy my application while using Qt_5_15_0_MinGW_32_bit-Release version. For Qt_5_14_0_MinGW_32_bit-Release version also, I had faced a similar problem but this link helped me solve my issue as they gave a link to a new windeployqt executable. Can i find a solution for the latest QT Version also?

[SGaist]

Hi,

What options are you passing to windeployqt ?

[saitej]

@SGaist
windeployqt.exe --quick --release --qmldir ../../app_name/ .

[mrjj]

@saitej
Hi
What platform do you see this "Unable to find the platform plugin" on ?
I have had some cases where Linux would show this after a upgrade to the Os.

[saitej]

@mrjj

Windows. I have built on the same system for previous versions of QT. With QT 5.15, i am getting the errors.

With MSVC:

The application gets build successfully but when I run the executable it crashes.

With Mingw: I get this error

[mrjj]

Hi
Could you try with
--compiler-runtime
as paramter also. MinGW has some runtime files and I wonder if you get
those included too.

[saitej]

@mrjj said in Unable to find the platform plugin.:

--compiler-runtime

I tried it out still gives the same error. Updated cmd for your reference.

windeployqt.exe --quick --release --compiler-runtime --qmldir ../../appfolder/ .

[mrjj]

@saitej
Ok and the generated folder does have the platform sub folder with the DLL in ?

[saitej]

no folder is generated inside the release directory

[mrjj]

@saitej
Yes i mean , it does get the right subfolder structure ?
http://www.tripleboot.org/?p=138

[SGaist]

In one of the bug report linked in the thread you got inspiration from, it's explicitly stated that you should not use --release with the pre-built binary. They are built in release mode with debug symbols.

[saitej]

@SGaist

After removing --release from the command, I could successfully deploy it with out the platform plugin error. Although, there is a strange thing happening. It is missing out the texttospeech plugin. I get this error when I run the executable from Qt creator after using the windeployqt

No text-to-speech plug-ins were found.

The same error I had shared on this post.

[SGaist]

And that was solved using Qt 5.15, correct ?

[saitej]

@SGaist

Ya. but I had not used windeployqt in the release folder at that time. As soon as I run windeployqt, i get this error No text-to-speech plug-ins were found. and the speech part does not work

[SGaist]

Check the corresponding plugins in your Qt installation and copy them over to your deployment folder.

[saitej]

@SGaist

Yes. I have already tried copying the following relevant texttospeech files from the Qt installation directory. Hope I have not missed out any? Also, is it possible that texttospeech does not work in a Qt Quick Application?

[SGaist]

It's the deployed version that currently has issues, correct ?

[saitej]

@SGaist

Yes Sir.

[SGaist]

Did you add the -texttospeech option to your windeployqt call ?

[saitej]

@SGaist said in Unable to find the platform plugin.:

-texttospeech

Ya I have tried adding -texttospeech in the windeployqt command also but no success. It still gives the same No text-to-speech plug-ins were found. error

[SGaist]

Did you do that in a clean folder ?