Unable to open the Report file (iexpress)

You probably need to run with elevated permissions, see the SS64 entry on IExpress.

Sorry, I know this is an old post, but I found a solution, and it doesn't need admin. To create an installer, navigate to the folder you are installing from, click the Explorer path bar, and type in "iexpress". Then, create the installer as normal. You do not need admin privileges. Make sure you save the installer to the same folder. This defines the %cd% environment variable as the path of your installer folder, which makes it work. Maybe it's something with the command-line bundler. I don't know. All I know is that it works. Even with a non-administrator account running as non-elevated.

Proof: