My basic MSI project has a prerequisite install which is launched beautifully when the setup.exe is double-clicked. The pre-requisite install does not get launched when the proj.msi file is double-clicked. Is this expected? or is there a way to tell InstallShield the pre-requisite should be bundled with proj.msi?
Yes, this is expected behavior. Setup.exe must be used to launch the InstallShield prerequisites. The following help topic explains various scenarios in which Setup.exe is required: Creating a Setup Launcher
You might want to consider addding an error custom action to your project to warn users, as described in the "Displaying an Error If an End User Launches the .msi Package Instead of the Setup Launcher" section of the following help topic: Setup Prerequisites vs. Feature Prerequisites
