How to force Inno Setup setup to fail when Run command fails?

Question

I have some commands in the [Run] section of my Inno Setup script. Right now, if any of them returns a failure code (non-zero return value), the setup continue

Answer 1

As far as I'm concerned, you have to use [Code] section for that, run the files with Exec function, check ResultCode upon return and run your uninstall script.