[wix-users] Need Advise on Upgrade

[Coryat, Jim]

My experience is that you want to target the Upgrade code since that should be consistent between versions. Also, I have seen the bootstrapper have a separate ARP entry than that of the actual msi files within the bootstrapper which made it very confusing.  The msi files would have that upgrade code within them which would make them a valid target for a isolated installer (as long as it contained that upgrade code).  We ended up replacing the bootstrapper with a pure Wix installer that does not rely on .NET so we can make the .NET framework a component of the install instead of a prerequisite which necessitated the use of the bootstrapper.
Hope this helps.

Again, nothing beats creating a test environment and experimenting. 😊

-----Original Message-----
From: wix-users <wix-users-bounces at lists.wixtoolset.org> On Behalf Of Ven H via wix-users
Sent: Friday, January 21, 2022 6:38 AM
To: WiX Toolset Users Mailing List <wix-users at lists.wixtoolset.org>
Cc: Ven H <venh.123 at gmail.com>
Subject: [wix-users] Need Advise on Upgrade

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We have existing Bootstrapper installers (exe) which bundle Prerequisites and custom MSIs. These MSIs handle a lot of functionality like Files, Windows Service Management, IIS Management, Database management etc. Now, we are planning to break these Bootstrapper installers and separate out functionality. But there are many customers who have these bootstrappers installed. Now, when we try to upgrade their system with the separate MSIs, will it work?

Bootstrapper has it's own Product & Upgrade code and so also the MSIs.
Also, for majority of the components, the Guid is auto generated. So, on systems which are installed with the bootstrapper, can I upgrade them with the separate MSIs? I tried once and observed that the files installed by bootstrapper seem to be getting removed. Please advise.

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