[wix-users] Allow multiple installs of our app on a single system

Rob Mensching rob at firegiant.com
Fri Oct 26 10:26:14 PDT 2018

https://docs.microsoft.com/en-us/windows/desktop/Msi/installing-multiple-instances-of-products-and-patches - WiX can help some with the InstanceTransform element but there is still a good bit "left to the interested reader".
 Short replies here. Complete answers over there: http://www.firegiant.com/

-----Original Message-----
From: wix-users <wix-users-bounces at lists.wixtoolset.org> On Behalf Of Todd Hoatson via wix-users
Sent: Friday, October 26, 2018 10:17 AM
To: wix-users at lists.wixtoolset.org
Cc: Todd Hoatson <todd.hoatson at gmail.com>
Subject: [wix-users] Allow multiple installs of our app on a single system

  I have a working installer for our app, coded in WiX.  The previous version of our app used a different installation tool.

  Now, if we try to install our newest version on a system where the previous version is already installed, an error message appears, requiring the user to uninstall the previous version first.

  We would like to eliminate this requirement.  We feel it is unnecessary.
Since I didn't put anything explicit in the WiX code to cause this, I'm unsure how to proceed.

  Any suggestions?  Our installer uses WixUI_Mondo, if that makes a difference...

  Thanks for any help you can offer.

Todd Hoatson
Mobile: 763-291-3312
Email:   todd.hoatson at gmail.com

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