Issue with QMessageBox

[joshuaschneid]

Hello,
I am runnig an application in UN20_WCE6 PLATFORM. am using VisualStudio 2008 to run the application
QMessageBox is not popping up a message box in "Release mode".
But in Debug mode message box is shown.
I am using QT Version 5.15

Please help me. Thanks in advance!

[rebnfa]

In Release mode, the compiler optimizes the code more aggressively than in Debug mode. These optimizations can sometimes lead to unexpected behavior, such as objects being optimized away, or certain code paths not being executed correctly.

Try turning off some optimizations in the Release configuration and see if the issue persists:

In Visual Studio, go to Project Properties > C++ > Optimization and set Optimization to "Disabled (/Od)" for testing purposes.
Rebuild the project and check if the QMessageBox is now displayed in Release mode.

Ensure that the QMessageBox is being called from the main thread and within the main event loop. If the QMessageBox is called from another thread in Release mode, it might not behave as expected. To ensure the message box is shown correctly, try wrapping the QMessageBox::exec() call in QMetaObject::invokeMethod, forcing it to execute in the main thread.