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InstallScript engine missing


When installing IGSS version 8.0, you get the error message below.


This error means that the IGSS installer wasn't able to put the InstallShield 8 engine in the C:\Program Files\Common Files\InstallShield\Driver\8 folder.

The common reason for this is that you have the InstallShield 1150 engine installed. This will override any attempt to install an older engine.

To remove the override, you need the Windows Installer Cleanup Utility from Microsoft. You can download it here http://support.microsoft.com/kb/290301/en-us.

  1. Download and install the utility.
  2. Run the installed utility.
  3. Find the InstallShield 1150 engine in the installed products list.
  4. Remove it.
  5. Run the IGSS installer.