for example, My application is called first, it needs qt mobility library. I add "installer_sis" to the Qt creater make argument.
The first time, I build the application, first.sis is created. the second time I build it, first_installer.sis is created. I think the first_installer.sis contain the smartinstaller.sis.
I install first_installer.sis, the installation is successful(it will verify the depended component, and install the QT mobility library).
then I Install the first_installer.sis again. but it failed. the message is "Installation failed!", I check the document, it says "Unrecoverable installation failure has occurred. Installation can be resumed later by selecting the Smart Installer icon from the Application menu."
why this fail? I think it should be successful.