visual studio - How to correctly create an onnx model in unity project and deploy it to hololens?

Question

I have an unity project that makes use of an onnx file to recognize objects. The problem is that the model is not created, and I always end up in the catch of ONNXModelHelper.cs script where it tells me: Model not created. Here are the pieces of code:

ONNXModel:

    public sealed class ONNXModel
{
    private LearningModel _learningModel = null;
    private LearningModelSession _session;

    public static async Task<ONNXModel> CreateOnnxModel(StorageFile file)
    {
        LearningModel learningModel = null;

        try
        {
            learningModel = await LearningModel.LoadFromStorageFileAsync(file);
        }
        catch (Exception e)
        {
            var exceptionStr = e.ToString();
            Debug.WriteLine(exceptionStr);
            throw e;
        }
        return new ONNXModel()
        {
            _learningModel = learningModel,
            _session = new LearningModelSession(learningModel)
        };
    }

ONNXModelHelper:

 public async Task LoadModelAsync()
    {
        ModifyText($"Loading {ModelFilename}... Patience");

        try
        {
            TimeRecorder = Stopwatch.StartNew();

            var modelFile = await StorageFile.GetFileFromApplicationUriAsync(
                new Uri($"ms-appx:///Data/StreamingAssets/{ModelFilename}"));
            Model = await ONNXModel.CreateOnnxModel(modelFile);

            TimeRecorder.Stop();
            ModifyText($"Loaded {ModelFilename}: Elapsed time: {TimeRecorder.ElapsedMilliseconds} ms");
        }
        catch (Exception ex)
        {
            ModifyText($"Model not created");
            Model = null;
        }
    }

Does anyone know how I can solve the problem ?

Edit: Stack trace from hololens debug

Loading native plugins
  Loading AudioPluginMsHRTF.dll
Module information:
 Built with Compiler Ver '191326128'
 Built from '2018.4/staging' branch
 Version is '2018.4.17f1 (b830f56f42f0)'
 Master build
 Application type 'D3D'
 OS 'Windows 10 (10.0.17134)'
GfxDevice: creating device client; threaded=1
Direct3D:
    Version:  Direct3D 11.0 [level 11.1]
    Renderer: HoloLens Graphics (ID=0x22b0)
    Vendor:   (null)
    VRAM:     604 MB
Initialize engine version: 2018.4.17f1 (b830f56f42f0)
If your machine has multiple graphics adapters, Unity may have created a WindowContext on the wrong adapter. If you experience a black screen when playing, please restart the Editor.
 
(Filename:  Line: 320)

Created eye textures with a "separate" layout.  The "multi-pass" stereo mode will be used.

 
(Filename:  Line: 2319)

UnloadTime: 1.370629 ms
Setting up 1 worker threads for Enlighten.
  Thread -> id: b64 -> priority: 1 
UnauthorizedAccessException: Access is denied.

Access is denied.

  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Security.SecurityRulesAttribute..ctor (System.Security.SecurityRuleSet ruleSet) [0x00000] in <00000000000000000000000000000000>:0 
  at ScanEngine..ctor () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner.InvokeMoveNext (System.Object stateMachine) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.SendOrPostCallback.Invoke (System.Object state) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner.Run () [0x00000] in <00000000000000000000000000000000>:0 
  at UnityEngine.Experimental.LowLevel.PlayerLoopSystem+UpdateFunction.Invoke () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.Tasks.SynchronizationContextAwaitTaskContinuation+<>c.<.cctor>b__7_0 (System.Object state) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.SendOrPostCallback.Invoke (System.Object state) [0x00000] in <00000000000000000000000000000000>:0 
  at UnityEngine.WSA.WindowSizeChanged.BeginInvoke (System.Int32 width, System.Int32 height, System.AsyncCallback callback, System.Object object) [0x00000] in <00000000000000000000000000000000>:0 
  at UnityEngine.UnitySynchronizationContext.Exec () [0x00000] in <00000000000000000000000000000000>:0 
  at UnityEngine.UnitySynchronizationContext.ExecuteTasks () [0x00000] in <00000000000000000000000000000000>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Security.SecurityRulesAttribute..ctor (System.Security.SecurityRuleSet ruleSet) [0x00000] in <00000000000000000000000000000000>:0 
  at ScanEngine..ctor () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner.InvokeMoveNext (System.Object stateMachine) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.SendOrPostCallback.Invoke (System.Object state) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner.Run () [0x00000] in <00000000000000000000000000000000>:0 
  at UnityEngine.Experimental.LowLevel.PlayerLoopSystem+UpdateFunction.Invoke () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.SendOrPostCallback.Invoke (System.Object state) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.Tasks.AwaitTaskContinuation.RunCallback (System.Threading.ContextCallback callback, System.Object state, System.Threading.Tasks.Task& currentTask) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.Tasks.SynchronizationContextAwaitTaskContinuation.Run (System.Threading.Tasks.Task task, System.Boolean canInlineContinuationTask) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.Tasks.Task.FinishContinuations () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.Tasks.Task.FinishStageThree () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.Tasks.Task.FinishStageTwo () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.Tasks.Task.Finish (System.Boolean bUserDelegateExecuted) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.Tasks.Task`1[TResult].TrySetException (System.Object exceptionObject) [0x00000] in <00000000000000000000000000000000>:0 
  at System.WindowsRuntimeSystemExtensions.GetAwaiter[TResult] (Windows.Foundation.IAsyncOperation`1[TResult] source) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1[TResult].Create () [0x00000] in <00000000000000000000000000000000>:0 
  at ScanEngine..ctor () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner.InvokeMoveNext (System.Object stateMachine) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.SendOrPostCallback.Invoke (System.Object state) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner.Run () [0x00000] in <00000000000000000000000000000000>:0 
  at UnityEngine.Experimental.LowLevel.PlayerLoopSystem+UpdateFunction.Invoke () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.Tasks.SynchronizationContextAwaitTaskContinuation+<>c.<.cctor>b__7_0 (System.Object state) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.SendOrPostCallback.Invoke (System.Object state) [0x00000] in <00000000000000000000000000000000>:0 
  at UnityEngine.WSA.WindowSizeChanged.BeginInvoke (System.Int32 width, System.Int32 height, System.AsyncCallback callback, System.Object object) [0x00000] in <00000000000000000000000000000000>:0 
  at UnityEngine.UnitySynchronizationContext.Exec () [0x00000] in <00000000000000000000000000000000>:0 
  at UnityEngine.UnitySynchronizationContext.ExecuteTasks () [0x00000] in <00000000000000000000000000000000>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Security.SecurityRulesAttribute..ctor (System.Security.SecurityRuleSet ruleSet) [0x00000] in <00000000000000000000000000000000>:0 
  at ScanEngine..ctor () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner.InvokeMoveNext (System.Object stateMachine) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.SendOrPostCallback.Invoke (System.Object state) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner.Run () [0x00000] in <00000000000000000000000000000000>:0 
  at UnityEngine.Experimental.LowLevel.PlayerLoopSystem+UpdateFunction.Invoke () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.SendOrPostCallback.Invoke (System.Object state) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.Tasks.AwaitTaskContinuation.RunCallback (System.Threading.ContextCallback callback, System.Object state, System.Threading.Tasks.Task& currentTask) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.Tasks.SynchronizationContextAwaitTaskContinuation.Run (System.Threading.Tasks.Task task, System.Boolean canInlineContinuationTask) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.Tasks.Task.FinishContinuations () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Threading.Tasks.Task.FinishStageThree () [0x00000] in <0000000000000000

Answer 1

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