Installshield Silent Uninstall not working at Command Line

You need to create first an ISS response file to silently remove your application,

1. Create response file : C:\App\Setup.exe /r /f1c:\app\uninstall1.iss you will be asked to uninstall, .... and perhaps reply the others windows. Then your application would be uninstalled and you get a new response file c:\app\uninstall1.iss

2. Next, if you want to remove silently this application on another computer : launch : C:\App\Setup.exe" /s /f1c:\app\uninstall1.iss

For more information see:

http://www.itninja.com/blog/view/installshield-setup-silent-installation-switches

Best Regards, Stéphane

Try this, with the original setup.exe version that was used to install

"C:\App\Setup.exe" /x /s /v/qn