Hello, I think I've found a bit of a bug: If you only put Temporary Files in the project, on clicking Build, AI complains that there must be a source file in order to proceed. Why doesn't AI count a temporary file as a source file? Temporary Files are just regular files with the stipulation that they be deleted after InstallFinalize, right?
This is not a bug in Advanced Installer. You are encountering this behavior because temporary files do not create components and a MSI must have at least a component.
The solution is to create a dummy registry file which always has a false condition so it will never be installed.