Avoid bloating the script with massive hard-coded arrays; use external data files instead.
Always sign the Setup.exe that wraps the .inx file to avoid "Unverified Publisher" warnings. Installshield Setup Inx
If you are a developer inheriting a legacy project and you only have the Setup.inx file without the original source code, you are in a "black box" situation. Can you decompile it? Avoid bloating the script with massive hard-coded arrays;
Understanding InstallShield Setup.inx: The Core of Legacy Installations Can you decompile it
In the world of InstallShield, developers write code in a language called (similar to C or Delphi). When the project is built, the compiler transforms the human-readable .rul files into a compiled binary format: the Setup.inx file.
The IsSetup.dll or Setup.exe reads this file at runtime.
Manually update the InstallScript engine on the machine by running the IsScript.msi provided by Flexera. 🚀 Best Practices for Developers