[WiX-users] Problem with Patch Creation

[<dar...@hb...>]

I am attempting to build a patch that is uninstallable but am not having
any joy so far.
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I am using Wix version 2 and my patch file is as follows:
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<Wix xmlns=3D" <http://schemas.microsoft.com/wix/2003/01/wi>
http://schemas.microsoft.com/wix/2003/01/wi">
  <PatchCreation Id=3D"{25AEF77A-1D90-4FD8-846B-63B3E5492AD3}"
Codepage=3D"1252">
    <PatchInformation Languages=3D"1033" SummaryCodepage=3D"1252"
AdminImage=3D"no" Comments=3D"Wix Samples" Compressed=3D"no" =
Description=3D"Wix
Package Type Sample" Keywords=3D"Installer" Manufacturer=3D"Darren"
ReadOnly=3D"no" ShortNames=3D"no" />
    <PatchMetadata AllowRemoval=3D"yes" Classification=3D"Update"
Description=3D"Darrens Wix Package Type Sample Patch" DisplayName=3D"Wix
Package Type Sample Patch" ManufacturerName=3D"Darren"
TargetProductName=3D"Wix Package Type Sample" />
    <Family Name=3D"Patch1" DiskId=3D"2" MediaSrcProp=3D"Patch1"
SequenceStart=3D"1000">
      <UpgradeImage Id=3D"upgImage1"
SourceFile=3D"C:\Dev\ProcessToolset\Packaging\Wix\Samples\Working\PackageT
ypes\Patch\UpdatedInstall\Output\wixscript.msi">
        <TargetImage Id=3D"tgtImage1"
SourceFile=3D"C:\Dev\ProcessToolset\Packaging\Wix\Samples\Working\PackageT
ypes\Patch\InitialInstall\Output\wixscript.msi" Order=3D"1" />
      </UpgradeImage>
    </Family>
    <TargetProductCode Id=3D"{008A89A4-8EDD-4F40-A88D-2F9FC7BA319D}" />
  </PatchCreation>
</Wix>
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In creating the patch I have ensured the following:
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--Specified AllowRemoval to be yes.=20
--I have Installer version 3 on my machine.
--Both MSI's from which the patch was built have InstallerVersion=3D"300"
specified.
--The patch only updates two existing files, it does not change the
structure of the package.
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The actual creation and installation of the patch works fine. However
once installed it says it is not removable. I have also looked in ORCA
and there is no sign of a MsiPatchMetadata table.
=20
This is my first attempt at patching and therefore may be missing
something. Any advice would be most appreciated.

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