Running tutorials on MacOS results in error.

[NiklasGustafsson]

Trying to run tutorial1.ipynb on MacOS-Arm64

https://github.com/dotnet/TorchSharpExamples/blob/main/tutorials/CSharp/tutorial1.ipynb

results in an error on the first TorchSharp invocation. It's dynamically looking for the wrong libtorch version number, '2.5.1.0' instead of '2.5.1'

Installed Packages
libtorch-cpu-osx-arm64, 2.5.1
TorchSharp-cpu, 0.105.0

Error: System.TypeInitializationException: The type initializer for 'TorchSharp.torch' threw an exception.
---> System.NotSupportedException: The libtorch-cpu-osx-arm64 package version 2.5.1.0 is not restored on this system. If using F# Interactive or .NET Interactive you may need to add a reference to this package, e.g.
#r "nuget: libtorch-cpu-osx-arm64, 2.5.1.0". Trace from LoadNativeBackend:

TorchSharp: LoadNativeBackend: Initialising native backend, useCudaBackend = False

This only seems to happen on MacOS, running tutorials on Windows works fine.

[ozanMSFT]

Hey @NiklasGustafsson , thanks for the report.

By meaning the first invocation, are you referring this code section in the tutorial1.ipynb?

using TorchSharp;

using static TorchSharp.torch.nn;
using static TorchSharp.torch.nn.functional;
using static TorchSharp.TensorExtensionMethods;

I'm trying to verify if issue is related to notebook or TorchSharp itself.

[NiklasGustafsson]

No, you have to go farther down the notebook, when it first creates a tensor. Before then, nothing is run.

I believe it has to do with .NET Interactive, and how TorchSharp loads the backend dynamically. For some reason, it's not affecting Windows (haven't tried tutorials on Linux).