Why can't I launch the installed software from the Bundle?

[NJullienSweet]

I have a bundle installing two dependencies and my MSI.
In this bundle, I want to get back from the MSI the directory where the the user chose to install the software, but apparently can't.
I tried using the INSTALLDIR and InstallFolder variables in the LaunchTarget attribute but had no success. I tried writing the default absolute path to the EXE in LaunchTarget to make sure it is not broken, this worked. I can conclude that the problem appears to be in recovering the user's path choice.
I could maybe use some kind of hack to fill a variable with a CustomAction looking for the install folder from the registry, but this seem way too dirty, there must be another fancier way to do so, I hope.
Here is the current state of the Bundle's WXS file.

<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs" xmlns:netfx="http://wixtoolset.org/schemas/v4/wxs/netfx" xmlns:bal="http://wixtoolset.org/schemas/v4/wxs/bal" xmlns:util="http://wixtoolset.org/schemas/v4/wxs/util">
  <Bundle Name="MyCompany MySoftware" AboutUrl="https://MyCompany.net" HelpUrl="https://MyCompany.net" IconSourceFile="D:\Dev\MySoftware\dev\MySoftware.WixSharpInstaller\Resources\Icon.ico" Manufacturer="MyCompany" UpgradeCode="6f330b47-2577-43ad-9095-1861bb25844b" Version="1.0.0.23" xmlns="">
    <BootstrapperApplication>
      <bal:WixStandardBootstrapperApplication LaunchTarget="[InstallFolder]\MySoftware.exe" SuppressOptionsUI="yes" LogoFile="D:\Dev\MySoftware\dev\MySoftware.WixSharpInstaller\Resources\Icon.png" Theme="hyperlinkLicense" LicenseUrl="" />
    </BootstrapperApplication>

    <Variable Name="InstallFolder" Value="[ProgramFiles64Folder]\MyCompany\MySoftware" Persisted="yes" />

    <Chain>
      <ExePackage InstallArguments="/install /quiet /norestart" RepairArguments="/repair /quiet /norestart" PerMachine="yes" DetectCondition="DOTNET_RUNTIME_CHECK &gt;= v8" Permanent="yes">
        <ExePackagePayload Hash="d2e92f8bdb2b840c3fee170f2ca3baa3237a6a56c7b86589f7e4d7a0d51d2605bafe045adbd14a0c43e946a8a895a621748418d1a2cb9c44370eafd1d1a8ffa9" Size="58183752" DownloadUrl="https://download.visualstudio.microsoft.com/download/pr/b280d97f-25a9-4ab7-8a12-8291aa3af117/a37ed0e68f51fcd973e9f6cb4f40b1a7/windowsdesktop-runtime-8.0.0-win-x64.exe" Name="windowsdesktop-runtime-8.0.0-win-x64.exe" />
      </ExePackage>

      <ExePackage InstallArguments="/silent /install" PerMachine="yes" DetectCondition="WEB_VIEW_RUNTIME_INSTALLED" Permanent="yes">
        <ExePackagePayload Hash="49e9ef8066200cd6ec079943c1fbcda95cab2d3042f635ed57949e0c0701ecdf34ea8f16324994dc77bc3ec9fc67882ea88b4d543974e90bf4e8cf69b15e073c" Size="1636808" DownloadUrl="https://go.microsoft.com/fwlink/p/?LinkId=2124703" Name="MicrosoftEdgeWebview2Setup.exe" />
      </ExePackage>

      <MsiPackage SourceFile="MySoftware installer.msi" bal:DisplayInternalUICondition="WixBundleAction = 6">
        <MsiProperty Name="InstallFolder" Value="[InstallFolder]" />
        <MsiProperty Name="WIXBUNDLEORIGINALSOURCE" Value="[WixBundleOriginalSource]" />
      </MsiPackage>
    </Chain>

    <util:RegistrySearchRef Id="RegistrySearch1" />
  </Bundle>

  <Fragment xmlns="">
    <util:RegistrySearch Key="SOFTWARE\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}" Value="pv" Variable="WEB_VIEW_RUNTIME_INSTALLED" Result="exists" Root="HKLM" Id="RegistrySearch1" />
  </Fragment>

  <Fragment xmlns="">
    <DotNetCompatibilityCheck Id="WindowsDesktopRuntimeCheck" Property="DOTNET_RUNTIME_CHECK" RollForward="latestMinor" RuntimeType="desktop" Platform="x64" Version="8.0.0" xmlns="http://wixtoolset.org/schemas/v4/wxs/netfx" />
  </Fragment>
</Wix>

Do you have any idea of other things to try? The documentation about this is topic very limited and the various samples I found unfortunately did not help me.

[wmanning]

Usually it's the other way around. You have the bundle tell your MSI where to install by passing in a property to the MSI.

<MsiPackage ...>
   <MsiProperty ...>
</MsiPackage>

Ideally you have GUI in the bundle to allow user to select directory and then do above.

[wmanning]

Also see this: https://robmensching.com/blog/posts/2012/6/25/b-is-for-bundle-and-thats-good-enough-for-me/