I am trying this on InstallShield 2011 and 2019 R3 both. I have created MSP and exe from MSI. I have 1 environment variable named VIP_PATH to in it. After uninstallation of MSP or exe it is editing itself to some another value automatically. Environment variable has following values: On Install > Set, Placement> Append, On Uninstall> Leave, Type> System.   I tried various combinations of above options is Environment Variable section but no luck. At the time of installation it is working perfectly fine but it is changing its value to some different value after uninstallation. This is weird. Can someone please help me how can I keep that Env Variable value intact even after uninstallation. ... View more