You need to change your MajorUpgrade@Schedule attribute to something like afterInstallInitialize. This will ensure that the previous version is removed before the downgrade version is installed. A downgrade like this won't allow you an overlapped upgrade.
-- John Merryweather Cooper Senior Software Engineer | Enterprise Service Applications | Continuing Development Jack Henry & Associates, Inc.® | Lenexa, KS 66214 | Ext: 431050 |jocoo...@jackhenry.com -----Original Message----- From: Rich Fowler [mailto:richwfow...@gmail.com] Sent: Wednesday, November 26, 2014 12:04 PM To: wix-users@lists.sourceforge.net Subject: [WiX-users] Need to support Downgrade installs I need to allow Downgrading installations. This is for an internal application where a user may need to install version "N" over version "N+1". Yes, I know this is frowned upon, but management insists. We need to make it seamless to our users. Forcing the user to first uninstall is not an option. I've searched most everywhere and think I am close to getting it right. However, after installing version "N" over top of "N+1" only the unchanged files remain. It looks like the installer is determining which files to install before version "N+1" is removed. Following is a stripped down installation file. The "ACMEVERSION" property changes from release to release as well as the file version withing the executable. After version 4.0.5.7 is installed, the directory contains two files - the exe and txt file. After 4.0.4.4 is installed, the directory only contains the txt file, which is unchanged between the versions. Any advice or comments are deeply appreciated. <?xml version="1.0" encoding="UTF-8"?><Wix xmlns="http://schemas.microsoft.com/wix/2006/wi";> <?define ACMEVERSION = "4.0.04.04" ?><!-- THIS IS THE ONLY LINE THAT CHANGES --> <?define UpgradeCode = "83ED9349-6CE8-49AF-AA9D-76A63BBF3667"?> <Product Id="*" Name="MyApp" Language="1033" Version="$(var.ACMEVERSION)" Manufacturer="Acme" UpgradeCode="$(var.UpgradeCode)"> <Package InstallerVersion="405" Compressed="yes" Manufacturer="Acme" /> <Property Id="ALLUSERS" Value="1" /> <MajorUpgrade AllowDowngrades="yes" Schedule="afterInstallValidate" RemoveFeatures="ProductFeature" /> <!--InstallExecuteSequence> <RemoveExistingProducts After='InstallInitialize' /> <InstallExecute After="RemoveExistingProducts" /> </InstallExecuteSequence --> <!-- Force uninstall of any previously installed version (Allow Upgrade AND DownGrade --> <Property Id='PREVIOUSVERSIONSINSTALLED' Secure='yes' /> <Upgrade Id='$(var.UpgradeCode)'> <UpgradeVersion Minimum='1.0.0.0' Maximum='99.0.0.0' Property='PREVIOUSVERSIONSINSTALLED' MigrateFeatures="yes" IncludeMinimum='yes' IncludeMaximum='no' /> </Upgrade> <MediaTemplate EmbedCab='yes' /> <Feature Id="ProductFeature" Title="MyApp" Level="1"> <ComponentGroupRef Id="ProductComponents" /> </Feature> </Product> <!-- we want to install into C:\Acme\ --> <Fragment> <Directory Id="TARGETDIR" Name="SourceDir"> <Directory Id="ACMEINSTALLFOLDER" Name="Acme" /> </Directory> <SetDirectory Id="TARGETDIR" Value="[WindowsVolume]" /> </Fragment> <Fragment> <ComponentGroup Id="ProductComponents" > <Component Id="AcmeAppComponent" Guid="304961E1-C871-4124-A802-76EFBA17E3A6" Directory="ACMEINSTALLFOLDER" > <RemoveFile Id="RmvFile" Name="AcmeApp.exe" On="install" /> <File Id="AcmeEXE" Name="AcmeApp.exe" Source="..\$(var.ACMEVERSION)\AcmeApp.exe" /> </Component> <Component Id="DocumentComponent" Guid="AD9DED34-7158-454E-8A3C-A9FC04F28621" Directory="ACMEINSTALLFOLDER" > <File Id="NOTES" Name="Notes.txt" KeyPath="yes" /> </Component> </ComponentGroup> </Fragment></Wix> ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! 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