The inferior stopped because it triggered an exception

[Ratzz]

I am using Qt 4.8.6 , Qt creator 3.4.1 , compiler msvc2008 in an windows 7 operating system .
when a try to run a new created project i get an error

Exception Triggered

<p>The inferior stopped because it triggered an exception.<p>Stopped in thread 0 by:
Exception at 0x64f7e49c, code: 0xc0000005: read access violation at: 0x0, flags=0x0 (first chance).
OK

Code is listed below

mainwindow .h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QApplication>
#include <QWidget>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();

private:
Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

main.cpp file

#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
}

MainWindow::~MainWindow()
{
delete ui;
}

[SGaist]

Hi,

Run your application through the debugger, it will tell you where there's a problem

[Ratzz]

@SGaist
Hi . It just gives me the The inferior stopped because it triggered an exception which points to
QApplication a(argc, argv);

Is it because i have two version of Qt installed ??
Qt 4.8.6 for msvc 2008 and Qt 4.8.6 for msvc 2010 installed

[SGaist]

No it should not, unless you've mixed the compilers in your Kit

[Ratzz]

@SGaist

I have 2 Qt installed Qt 4.8.6 for msvc 2008 and Qt 4.8.6 for msvc 2010
Two compilers Microsoft Visual Studio 10.0 and Microsoft Visual Studio 9.0
3 debuggers windows kits 10(version 10.0), windows kits 8.0(version 6.2) and Debugging Tools for Windows (x86) (version 6.11)

I have 2 combination of kits.
1)Desktop_msvc2008
Qt-4.8.6 for msvc 2008
compiler-Microsoft Visual Studio 9.0
debugger-Debugging Tools for Windows (x86) (version 6.11)

Which gives me "The CDB process terminated) error''

2)Desktop_msvc2010
Qt-4.8.6 for msvc 2010
compiler-Microsoft Visual Studio 10.0
debugger-windows kits 8.0(version 6.2)

which gives me "The inferior stopped because it triggered an exception".

Did i configure kits correctly ??