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@Alien_123 said in Installation error:

How to correct it.

You already posted the solution by yourself:
"You can select a different mirror for opensource metadata and downloads. The mirror can be set from terminal using option --mirror."
So, do exactly that. More details here: https://wiki.qt.io/Online_Installer_4.x

Edit -> Preferences... -> Environment -> Theme.

you can reach us with specs your a looking for if you need web graphics designers.

It's hard to tell what went wrong from the input you gave. You may set the QT_DEBUG_PLUGINS environment variable to get the debug information. Don't hesitate to post it here, so we can continue the investigation.

@daisyvish You need to add this library to your app. See here for more details: https://doc.qt.io/qt-5/third-party-libraries.html

Thank you @sierdzio and @JonB , your suggestions has helped me out .I had to find what are the string values to be sent through Qjsonarray and then iterate through them , followed by some string techniques to retain the order .Finally i was able to get the response's from the consumer !!!

@AntonioValentin said in The process "/usr/bin/make" exited with code 2.:

../agejet/rfid_worker.cpp:136:35: error: narrowing conversion of ‘250’ from ‘int’ to ‘char’ inside { } [-Wnarrowing]
char init_bytes[] = {0xFA,0x12};

250 is too big for char (which is signed). Use unsigned char.

And, please, keep in mind that you're asking questions completely unrelated to Qt. Use Google to search for your compiler errors/warnings, read a book about C++...

Hi @SHUBHAM-SINGH-RAO,

For USB flash drives, QStorageInfo might be the better solution.

Regards

@jsulm It was because of repetitive failure in feature upgradation in my Jessie image. I changed my image and installed bluez in new image

I'd say the code related to I2C.

Do you have any other processes that are consuming files on your target ?

@sgaist thanks . I upgraded jessie to stretch, then to buster. The Qt Creator version remains same, which has sorted my problem

@shubham-singh-rao said in Qt Source code of Jessie Image not working in Buster Image?:

Why its not running basic libraries of Qt in buster?

Did you installed all needed parts of Qt on buster?
Also, if you have copied the build directory delete it, run qmake and rebuild.

thanks a lot for your respond@Pradeep-Kumar
i have solved that error .i.e. just by copying that libraries to my path
/usr/local/Trolltech/QtEmbeddedQtEmbedded-4.8.6-arm/lib and build it successfully!!!!!