x64 NT preloader only runs on x64 platforms - please adjust build platforms

You selected the x64 Unicode preloader in the Build - Advanced dialog box. This preloader only runs on x64 Windows platforms, and any attempt to start the installer on a different platform will result in an error message from Windows that will confuse the user.

Background information

The installer package internally starts with a small preloader program that is responsible for loading the actual installer. It is important that this preloader is compatible with the intended target platforms, because a failure to start the preloader prevents the installer from handling any errors gracefully.

InstallMate 9 includes three different preloaders: 32-bit ANSI, 32-bit Unicode, and x64 Unicode. The first of these runs on all 32-bit and 64-bit Windows platforms except the 64-bit WinPE versions. The other two are more platform specific and should only be used in special circumstances.

For more information about the installer internals, see Setup stubs.