Which device is it?

I’d start by checking the security settings of the application.

The device is N9.

Is that the security settings you mean qtc_packaging\debian_harmattan\manifest.aegis?

My application needs the following rights on Symbian

1. Allow network access on Symbian
   symbian:TARGET.CAPABILITY += NetworkServices

But I can’t find what is it on N9:
from THIS [harmattan-dev.nokia.com] link.

I’ve removed all cpp files, now it can be launched by icon in app menu.
But adding the cpp files(no code do actually work), problem remains.

Then N9 isn’t a Symbian device. As such, the Symbian Target Capabilities have no effect on deploying or running N9 apps.

useryy wrote:

I’ve removed all cpp files, now it can be launched by icon in app menu. But adding the cpp files(no code do actually work), problem remains.

Hard to say what is causing that, but it sounds like it could be a bug in your C++ code causing application to crash at startup.