If an InstallShield setup fails with a generic error like “Error -1603: Fatal error during installation,” advanced packagers will extract the setup.inx to check for custom actions or dependencies. You can open a setup.inx in a hex editor to see embedded strings (error messages, registry paths), though this is painstaking.
You inherit an old application without the original .ism project file. You have only the compiled setup.exe and its setup.inx . You cannot edit the logic, but you can: Installshield Setup Inx
Need a deeper fix? Check your InstallShield project’s “Media” build tab – a failed build often produces a broken .inx. If an InstallShield setup fails with a generic
Installshield Setup INX files are used in a variety of scenarios, including: You have only the compiled setup
: Developers write code in Setup.rul (and any included .h or .rul files) using the InstallScript language .