#!import <another-ipynb> throws exception

[webteckie]

The package and version I'm asking about:

Question

Trying to import another .ipynb into a notebook throws the following exception. The notebook being imported runs fine. To keep things simple, in the current notebook only the import cell is present. I think I have the latest version of everything. Thanks in advance for any pointers here.

Error: System.Text.Json.JsonException: The input does not contain any JSON tokens. Expected the input to start with a valid JSON token, when isFinalBlock is true. Path: $ | LineNumber: 0 | BytePositionInLine: 0.
---> System.Text.Json.JsonReaderException: The input does not contain any JSON tokens. Expected the input to start with a valid JSON token, when isFinalBlock is true. LineNumber: 0 | BytePositionInLine: 0.
at System.Text.Json.ThrowHelper.ThrowJsonReaderException(Utf8JsonReader& json, ExceptionResource resource, Byte nextByte, ReadOnlySpan`1 bytes)
at System.Text.Json.Utf8JsonReader.Read()
at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, T& value, JsonSerializerOptions options, ReadStack& state)
--- End of inner exception stack trace ---
at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& state, JsonReaderException ex)
at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, T& value, JsonSerializerOptions options, ReadStack& state)
at System.Text.Json.Serialization.Metadata.JsonTypeInfo`1.Deserialize(Utf8JsonReader& reader, ReadStack& state)
at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 utf8Json, JsonTypeInfo`1 jsonTypeInfo, Nullable`1 actualByteCount)
at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 json, JsonTypeInfo`1 jsonTypeInfo)
at System.Text.Json.JsonSerializer.Deserialize[TValue](String json, JsonSerializerOptions options)
at Microsoft.DotNet.Interactive.Documents.Jupyter.Notebook.Parse(String json, KernelInfoCollection kernelInfos) in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive.Documents\Jupyter\Notebook.cs:line 44
at Microsoft.DotNet.Interactive.Documents.InteractiveDocument.LoadAsync(FileInfo file, KernelInfoCollection kernelInfos) in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive.Documents\InteractiveDocument.cs:line 144
at Microsoft.DotNet.Interactive.KernelExtensions.LoadAndRunInteractiveDocument(Kernel kernel, FileInfo file, KernelCommand parentCommand) in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelExtensions.cs:line 114
at Microsoft.DotNet.Interactive.KernelExtensions.<>c__DisplayClass4_0`1.<<UseImportMagicCommand>b__0>d.MoveNext() in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelExtensions.cs:line 103
--- End of stack trace from previous location ---
at Microsoft.DotNet.Interactive.Kernel.HandleAsync(KernelCommand command, KernelInvocationContext context) in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\Kernel.cs:line 365
at Microsoft.DotNet.Interactive.CompositeKernel.HandleAsync(KernelCommand command, KernelInvocationContext context) in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\CompositeKernel.cs:line 216
at Microsoft.DotNet.Interactive.KernelCommandPipeline.<BuildPipeline>b__6_0(KernelCommand command, KernelInvocationContext context, KernelPipelineContinuation _) in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 60
at Microsoft.DotNet.Interactive.KernelCommandPipeline.<>c__DisplayClass6_1.<<BuildPipeline>b__3>d.MoveNext() in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 75
--- End of stack trace from previous location ---
at Microsoft.DotNet.Interactive.App.KernelExtensions.<>c__DisplayClass6_0.<<UseTelemetrySender>b__0>d.MoveNext() in D:\a\_work\1\s\src\dotnet-interactive\KernelExtensions.cs:line 457
--- End of stack trace from previous location ---
at Microsoft.DotNet.Interactive.KernelCommandPipeline.<>c__DisplayClass6_1.<<BuildPipeline>b__3>d.MoveNext() in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 75
--- End of stack trace from previous location ---
at Microsoft.DotNet.Interactive.App.KernelExtensionLoader.<>c__DisplayClass0_0.<<UseNuGetExtensions>b__0>d.MoveNext() in D:\a\_work\1\s\src\dotnet-interactive\KernelExtensionLoader.cs:line 25
--- End of stack trace from previous location ---
at Microsoft.DotNet.Interactive.KernelCommandPipeline.<>c__DisplayClass6_1.<<BuildPipeline>b__3>d.MoveNext() in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 75
--- End of stack trace from previous location ---
at Microsoft.DotNet.Interactive.App.KernelExtensions.<>c__DisplayClass5_0.<<UseSecretManager>b__0>d.MoveNext() in D:\a\_work\1\s\src\dotnet-interactive\KernelExtensions.cs:line 388
--- End of stack trace from previous location ---
at Microsoft.DotNet.Interactive.KernelCommandPipeline.<>c__DisplayClass6_0.<<BuildPipeline>g__Combine|2>d.MoveNext() in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 73
--- End of stack trace from previous location ---
at Microsoft.DotNet.Interactive.KernelCommandPipeline.<>c__DisplayClass6_0.<<BuildPipeline>g__Combine|2>d.MoveNext() in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 73
--- End of stack trace from previous location ---
at Microsoft.DotNet.Interactive.KernelCommandPipeline.<>c__DisplayClass6_0.<<BuildPipeline>g__Combine|2>d.MoveNext() in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 73
--- End of stack trace from previous location ---
at Microsoft.DotNet.Interactive.KernelCommandPipeline.SendAsync(KernelCommand command, KernelInvocationContext context) in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 41

[jonsequitur]

I made a very simple attempt to repro this and it's working fine for me on the same version so the issue seems to be with the imported notebook. If that notebook is working fine for you when opened directly, then the JSON parsing exception could maybe point to a text encoding issue.

Are you able to share the imported notebook file?