I created a project in the Apple Media Tool and tried to compile it for both the Macintosh and MS Windows by clicking the appropriate checkboxes in the Runtime Maker. In some cases, the Runtime Maker fails to compile. In other cases, the finished runtime does not work. Why?
You should not compile a runtime for both the Macintosh and MS Windows at the same time. Create a runtime for one platform, then create the runtime for the other platform.