"Grpc.Core: Error loading native library" on Windows ARM

[MichaMican]

In have a similar issue as the Mac folks (#148) when trying to start a azurefunction in VSCode.
I am on a Windows ARM device is there a similar wokrarround for Windows ARM devices?

Full exception message:

[2025-07-23T07:31:43.543Z] A host error has occurred during startup operation '157e7aef-8c79-4cdc-90d2-aafa0db535c3'.
[2025-07-23T07:31:43.544Z] Grpc.Core: Error loading native library. Not found in any of the possible locations: D:\<PROJECTPATH>\bin\Debug\net8.0\.azurefunctions\grpc_csharp_ext.arm64.dll,D:\<PROJECTPATH>\bin\Debug\net8.0\.azurefunctions\runtimes/win-arm64/native\grpc_csharp_ext.arm64.dll,D:\<PROJECTPATH>\bin\Debug\net8.0\.azurefunctions\../..\runtimes/win-arm64/native\grpc_csharp_ext.arm64.dll.
Value cannot be null. (Parameter 'provider')

Something that bogs me is that in Visual Studio (not VSCode) it works without a probelm - but i assume the Visual Studio extensions use a different implementation then the VSCode Azure function extension.
Unfortunately I can't use Visual Studio anymore...

Any help is much appreciated

[nytian]

Hey @MichaMican thanks for the information provided. Can you share the package name and version you are using?

[MichaMican]

@nytian
Azure function extension: v1.18.1

FunctionApp dependencies/packages in C# project:

<PackageReference Include="Microsoft.Azure.Functions.Worker" Version="2.0.0" />
<PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.DurableTask" Version="1.1.1" />
<PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http.AspNetCore" Version="2.0.1" />
<PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Storage.Queues" Version="5.4.0" />
<PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Timer" Version="4.1.0" />
<PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="2.0.1" />
<PackageReference Include="Microsoft.Azure.Functions.Worker.ApplicationInsights" Version="2.0.0" />

.Net Version: net8.0

VSCODE:

Let me know if you need further info

[nytian]

@MichaMican It looks like you’re using an older version of the DurableTask package, which might be causing the issue. Could you try updating to the latest version instead? You can get it here: https://www.nuget.org/packages/Microsoft.Azure.Functions.Worker.Extensions.DurableTask/1.6.1.
Just change the package version from v1.1.1 to v1.6.1.