Error and crahs in simple application QWidget: Must construct a QApplication before a QWidget

[Qba10]

Hi

I have very simple app with PythonQt

int main(int argc, char *argv[]){


QApplication a(argc, argv);
PythonQt::init(PythonQt::IgnoreSiteModule );

MainWindow w;
PythonQtObjectPtr  mainContext = PythonQt::self()->getMainModule();
PythonQt_QtAll::init();

mainContext.evalScript("\
from PythonQt.QtGui import * \n\
print 'hello'; \
group = QGroupBox() \
                          ");



qDebug() << "Start Application";
w.show();
console.show();
int result = a.exec();
 return result;

When I add "group = QGroupBox()" i my python Script i get error QWidget: Must construct a QApplication before a QWidget and program crash
What should I do ?

I compiled PythonQt with:

PythonQt2.1_Qt4.8 src
Qt 5.3
Python 2.7
Windows 8.1
mingw32

}

[Florian Link]

That sounds strange. The PythonQt version that you mention does not support QT 5,
so probably you are linking against either the wrong or both Qt versions. I would guess PythonQt with Qt 4 and your app with Qt 5.

If you want Qt 5 support, you need to use the svn trunk of PythonQt, since Qt 5 support is not yet released as a zip file.

[Qba10]

Sorry my wrong.
The last I used source from trunk revision 371.

Edit

Example PyGuiExample work on my computer

Edit2

It works when i build Application on Release
Why it doesn't work on Debug ?