Unable to load msp project using firegaint Visual Studio Extension : WiX V4

[kalyani1217]

Using WiX v3.11, I have used a torch, candle, light, and pyro to create the MSP package.
Now, I'm using WiX v4.0.3 and Heatwave to create a WiX project. The output type patch is not present to create a patch project.
I have manually added the OutputType patch to the.wixproj file, and I have successfully created a msp file.

However, when I unload and reload the project, the reloading does not work. Reload throws an error: "error: Unrecognized OutputType in project file: Patch."
Please suggest how to work with the OutputType patch.

Patch.wxs:

<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
  <Patch Id="<GUID>" 
         AllowRemoval="yes" 
         Manufacturer="me" 
         MoreInfoURL="<url>" 
         DisplayName="name"
         Description="BA Test Application Patch" 
         Classification="Update">

    <Media Id="5000" Cabinet="RTM.cab">
      <PatchBaseline Id="RTM" 
                     BaselineFile="C:\WIX\Setup\bin\x86\Debug\SetupMain.msi"
                     UpdateFile="C:\WIX\SetupMainHotFixRelease1\bin\x86\Debug\SetupMainHotFixRelease1.msi"
                     />
    </Media>

    <PatchFamilyRef Id="BATestPatchFamily" />
  </Patch>

  <Fragment>
    <PatchFamily Id="BATestPatchFamily" Version="1.0.0.101" Supersede="yes">
      <ComponentRef Id="HF1Text"/>
    </PatchFamily>
  </Fragment>
</Wix>

HotFix.wixproj:

<Project>
  <Import Project="Sdk.props" Sdk="WixToolset.Sdk" Version="4.0.3" />
  <PropertyGroup>
    <OutputType>Patch</OutputType>
    <SuppressSpecificWarnings>1079</SuppressSpecificWarnings>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x86' ">
    <DefineConstants>Debug</DefineConstants>
  </PropertyGroup>
  <Import Project="Sdk.targets" Sdk="WixToolset.Sdk" Version="4.0.3" />
</Project>

[robmen]

I'm pretty sure there is still a feature request open to support building patches using MSBuild. Very much not supported in WiX v3 (very hard). I think it'd be very possible to implement with the new build system.