1.8 single packaging project could generate the msixbundle but failed to generate the appxsym

[zhuxb711]

Describe the bug

I tried to generate the msixbundle with Windows App SDK 1.8 but seem the appxsym generation throw an exception.

C:\Users\AAA\.nuget\packages\microsoft.windows.sdk.buildtools.msix\1.7.20250829.1\build\Microsoft.Windows.SDK.BuildTools.MSIX.Packaging.targets(3045,5): error MSB6006: “mspdbcmf.exe” have exited，fatal error CMF1106

This error threw from Target _GenerateAppxSymbolPackage.WinAppSdkGenerateAppxSymbolPackage

Steps to reproduce the bug

Here is the pdb that generated My-App.pdb, I tried to run the mspdbcmf.exe directly with the pdb but still got

C:\Users\AAA\Downloads\My-App.pdb : fatal error CMF1106:

I have not idea what is going wrong, the msixbundle generated but due to this error, appxsym missing and the whole generation process failed

Expected behavior

Should be everything ok

Screenshots

NuGet package version

Windows App SDK 1.8.250907003

Packaging type

MSIX

Windows version

Windows 11 10.0.26100.6584

IDE

Visual Studio 2022 17.14.14

[zhuxb711]

Try to generate the msixbundle in Debug mode also failed. Which means this is not related to the PublishReadyToRun & PublishReadyToRunComposite

<PublishReadyToRun Condition="'$(Configuration)' == 'Release'">true</PublishReadyToRun>
<PublishReadyToRunComposite Condition="'$(Configuration)' == 'Release'">true</PublishReadyToRunComposite>

[mominshaikhdevs]

• [Single Project MSIX] Generated appxsym/msixsym has Managed PDB when Native AOT is enabled #5415.

[zhuxb711]

<Target Name="_GenerateAppxSymbolPackage" Condition="Exists ('$(MsPdbCmfExeFullpath)') And '@(PDBPayload)' != ''" Inputs="$(MSBuildAllProjects);@(PDBPayload);@(FinalAppxManifest)" Outputs="$(AppxSymbolPackageOutput)" DependsOnTargets="_EnsurePdbCmfExeFullPath">

this target could not be bypass by setting AppxSymbolPackageEnabled=false

[zhuxb711]

Any workaround available? @Scottj1s @mominshaikhdevs

[zhuxb711]

Workaround: Set this config in the project to force make mspdbcmf.exe could not be found during the MSIX packaging to bypass the exception

<MsPdbCmfExeFullpath>None</MsPdbCmfExeFullpath>

And disable the AppxSymbolPackageEnabled is also necessary for msbuild

/p:AppxSymbolPackageEnabled="false"