[wix-users] Serious problem with FindRelatedProducts and install context

Edwin Castro egcastr at gmail.com
Tue Mar 27 16:23:36 PDT 2018

Just curious, what do you mean "there's only one set of files"?

A per-user install and per-machine install should probably install to
different locations. What if UserA and UserB both perform per-user
installs? Those installs should not conflict with one another and should
not conflict with a per-machine install.

I have a feeling you'll need a bootstrapper to install the upgrade MSI with
appropriate values for ALLUSERS and MSIINSTALLPERUSER depending on whether
the user wants to install/upgrade per-user vs per-machine...

Edwin G. Castro

On Tue, Mar 27, 2018 at 4:05 PM, Alan Sinclair via wix-users <
wix-users at lists.wixtoolset.org> wrote:

> I'm making a dual-scope MSI which uses the InstallScope dialog for the user
> to choose per-user or per-machine. It installs fine, but upgrades to a
> per-machine installation fail.
> FindRelatedProducts seems to search only the scope in current force when it
> runs, and it's sequenced right at the start (so early it doesn't even
> appear in the log.)
> My MSI has ALLUSERS=2 and MSIINSTALLPERUSER=1, with the InstallScope dialog
> changing that as required, so FindRelatedProducts looks only in per-user
> scope.  If an earlier-versioned MSI was installed per-machine,
> FindRelatedProducts
> does NOT find it, so the install does not upgrade, and Control Panel's ARP
> shows the product twice (there's only one set of files, of course).
> Is there any way to solve this?  Can FindRelatedProducts be run later in
> the sequence, after the UI? Or can FindRelatedProducts be run twice?
> Or can I add custom actions before FindRelatedProducts to look in the
> registry and check previous install scope, then adjust ALLUSERS etc
> accordingly so FindRelatedProducts searches the right scope?
> How can a dual-scope package be upgraded in both per-user AND per-machine
> installations?
> Thanks
> Alan
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