Silent upgrade

[shayl6]

hi

i can do silent install , and silent uninstall with no problem ,

but silent upgrade do only uninstall why ?

when I'm using the UI the upgrade do uninstall and install the new product ,

on silent mode the second setup do uninstall and stop , i'm using basic MSI installshield 2019 R3 , the project configure to do uninstall in case of upgrade and that is ok ,

but not in silent mode , here is the command that I'm using :

Setup.exe" /s /v"/qn INSTALLDIR=\"C:\\Program Files (x86)\\HCL\\my soft\"" /L1033

then i run the upgrade same way :

Setup.exe" /s /v"/qn INSTALLDIR=\"C:\\Program Files (x86)\\HCL\\my soft\"" /L1033

maybe i need different command for that ?
i get only uninstall here , its not the same setup , and with UI its uninstall and and the new one.

[shayl6]

anybody ?