WIX: No InstallUISequence table being created in MSI

Question

I have a wix file that includes this snippet:

        <CustomAction Id="DownloadCache" FileKey="CACHEDOWNLOADER.EXE" ExeCommand="/v" Execute="deferred" Return="ignore"/>
        <UI>
            <Dialog Id="ExitDialog" Title="Product Installer" Height="60" Width="250">
...
            </Dialog>
            <Dialog Id="FatalErrorDialog" Title="Product Installer" Height="60" Width="250">
...
            </Dialog>
            <TextStyle Id="DefaultFont" FaceName="Arial" Size="10" />
            <Property Id="DefaultUIFont" Value="DefaultFont" />
            <InstallUISequence>
                <Custom Action="DownloadCache" After="ExecuteAction">(NOT Installed) AND (Not REMOVE)</Custom>
                <Show Dialog="ExitDialog" OnExit="success" />
                <Show Dialog="FatalErrorDialog" OnExit="error" />
            </InstallUISequence>
        </UI>
        <InstallExecuteSequence>
            <Custom Action="DownloadCache" After="WriteRegistryValues">(NOT Installed) AND (Not REMOVE)</Custom>
        </InstallExecuteSequence>

Issue is, resulting .MSI does NOT contain an InstallUISequence table.

I went through this tutorial and above seems correct. I'm definitely missing something here. Any hint? Thanks.

Answer 1

There must be more then meets the eye here. Even the most simplest fragment below will generate an InstallUISequence table with the bare minimum actions of ValidateProductID, CostInitialize, FileCost, CostFinalize and ExecuteAction. No actual UI elements per say but that's another issue.... ( Are Dialogs Optional Now?? )

<Wix...>
  <Product...>
    <Package.../>
  </Product>
</WiX>