Have you tried to run qmake again ?

You can go to Qt Command prompt of proper Symbian device version (4.6.3 Symbian^1 or 4.6.3 Symbian^2 or 4.7.3 Symbian^1 or 4.7.3 Symbian^3) and write (when you are in the folder of your project):
...

Ok, thank you for response. I'll try to make my application with only one QDeclarativeView.

The problem is when you need more QWidget built one up another (stackedWidget) and you want maintain
stack condition because single view need much time to load and you don't want make user delay...

I've analyzed available memory with Nokia Performance Tool

But if you need more QDeclarativeView because you have a stacked widget as MainWindow's centralWidget ?

One instance not is always enough if you need to interact with QDeclarativeEngine (passing...

I've a simple application that load QDeclarativeView from QML file.

I've a strange problem that at 12th QDeclarativeView instance, my application crash.
Then, i've wrote a simple test...

Now it's available QGraphicsGeoMap class.

Use is very simple:

QVBoxLayout *vLayout = new QVBoxLayout(this);

QGeoServiceProvider *serviceProvider = new QGeoServiceProvider("nokia");
...

You can start from here:
http://www.forum.nokia.com/Develop/Qt/Getting_started/

Have you
TARGET.CAPABILITY +=NetworkServices

in your .pro ?

Otherwise, have you tried to connect to url on a pc using a browser (to see the reply) ?

In your .pro you are missing RESOURCES specification as

RESOURCES += <file resource>

It's a problem about focus on QMainWindow where are QLineEdit.

When you return from other form opened after clicking button, .hide() and then .show() your QMainWindow where are your QLineEdit.

You can simulate "red key" click.

Have you tryed example of QCamera from http://doc.qt.nokia.com/qtmobility-1.0-tp/qcamera.html#details

camera = new QCamera;
viewFinder = new QVideoWidget(camera);
viewFinder->show();...

Have you tryed to call hide() method of your QMainWindow object?

Ok ... then i have completely formatted my C7 (and so i had to install Qt 4.6.4 [developer]), can i try to reflash device at Nokia care and restore totally factory value for Qt ?

Have you solved?

You also have a QMainWindow object, which you have setted centralWidget with first widget. So connecting first button clicked signal to a function that change centralWidget for your QMainWindow.
...

Not completely true. Infact with a deep reset (*#7370#), Qt are in devices after reboot.

But, with a format of device (volume down + menu + camera button + power) remove completely Qt. So, as you...

You can use Camera also in Qt 4.6 with Symbian C++.

Post part of code

Change TARGET value in .pro file.

Ex.

TARGET = "The App"

Using Symbian c++:

http://library.forum.nokia.com/index.jsp?topic=/S60_5th_Edition_Cpp_Developers_Library/GUID-759FBC7F-5384-4487-8457-A8D4B76F6AA6/html/HS_Widget_Publisher_API4.html

You can make this directly in Symbian C++.

If you need, i'm developing an application controlling outgoing call.

Try this and remember to add this in .pro file:

# make call s60
LIBS +=...

Have you tried to insert log file to track every important action?