Azure-functions-vs-build-sdk: Runtime Exception in 1.0.13 - "Could not find file function.json"

[steveng57]

Create an empty function using 1.0.13, and ran it. I has nothing but the defaults set in it...target runtime is ".NET Standard 2.0", which I believe is actually Core.

Visual Studio 2017 immediately reports a file-not-found exception in System.Private.CoreLib.dll , "Could not find the file "...FunctionApp1FunctionApp1binDebugnetstandard2.0binfunction.json".

its looking in the wrong places...the path for function.json file is ".....FunctionApp1FunctionApp1binDebugnetstandard2.0Function1function.json"

[lgoudriaan]

~I deleted my .vs folder + .suo file and it worked again. I think deleting .vs folder was enough.~
I thought that was the solution, it seems to be the Break on All Common language runtime Exceptions was on. @steveng57 Can you confirm this?

[iotalambda]

Any updates on this? With nothing but the defaults, the following function throws an exception:

using System;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Host;

namespace FunctionApp1
{
    public static class Function1
    {
        [FunctionName("Function1")]
        public static void Run([QueueTrigger("myqueue-items", Connection = "AzureWebJobsStorage")]string myQueueItem, TraceWriter log)
        {
            log.Info($"C# Queue trigger function processed: {myQueueItem}");
        }
    }
}

The exception occurs at ScriptHost.cs:1081

System.IO.FileNotFoundException: 'Could not find file 'C:ReposSolution1FunctionApp1binDebugnetstandard2.0binfunction.json'.'

function.json file is actually generated at C:ReposSolution1FunctionApp1binDebugnetstandard2.0Function1function.json

This happens with both versions 1.0.13 and 1.0.14.

[speeddm]

The workaround for me is to turn off breaking on FileNotFoundException.

[dhabierre]

At _Exception Settings_ view, in Visual Studio I presume.

Or uncheck the _Break when this exception type is thrown_ choice in the Exception popup when it appears and press Enter to continue.

[davidrevoledo]

any news about here it's quite annoying 👎

[vijayrkn]

@dhabierre - Do you have the callstack by any chance? Is this still an issue?

[dhabierre]

@dhabierre - Do you have the callstack by any chance? Is this still an issue?

Sorry, I don't have it and I cannot reproduce the error.

[vijayrkn]

Thanks for the confirmation. Will close the issue.

[VividDigital]

I'm getting this as well. Both exactly as the initial comment (looking in main bin instead of subfolder). I was also getting it for a dll in a nuget package that just wasted me about 3 hours. The dll is in the correct place.

Turning off the exception worked but still don't understand why this is happening.

netcoreapp2.2 and Microsoft.NET.Sdk.Functions 1.0.24 on VS 15.9.7

[jonathandbyrd]

still getting this error as well, VS2019, all updates installed as of 03-May-2019, latest of all Azure Function updates etc. Works fine in VSCode

[ghost]

I have this issue as well with VS 2019 Preview, dotnetcore 3.0 Preview 5 (dotnetcore 2.1 and 2.2 are also installed).

[wallmat]

Any update on this issue? I get this same issue when adding a new Azure function to our existing solution but not to a new solution. Is there a way to change where it looks that could be breaking this?

I have the latest of everything as of today.

[pinaki1234]

Not sure how this issue is closed? Today on June 26 - we are still getting this issue.

[wallmat]

I found out this goes away if I use Functions V1 instead of V2

[pinaki1234]

Functions V1 introduces NewtonSoft Json issue for me - that s the main reason I am shifting to V2.

[bugoutfr]

Hi, I'm having exactly the same problem when trying to debug (locally) an Azure Function project which I just created using VS2017 or VS2019. I haven't changed a single line of code before hitting F5 after VS generated the project.

[vijayrkn]

@bugoutfr - In your csproj file, what is the version of Functions sdk package?

<PackageReference Include="Microsoft.NET.Sdk.Functions" Version="1.0.29" />

[wallmat]

Im not sure if this is the right way to do this but only working fix i found was to follow this if your using 64bit
https://www.henkboelman.com/azure-function-x64-dev-setup/

[bugoutfr]

@vijayrkn - it's exactly the same reference in my csproj file.
As mentionned before: continuing the debug session actually works (my VS was set to break on any framework generated exception), I added an exception as suggested by @speeddm

[vijayrkn]

@wallmat - We are working on getting the x64 bit dev setup working in VS by default. It should be available soon.

@bugoutfr - What is the exact error?

[vijayrkn]

Also can you check if you have .NET Core 2.1 runtime installed? You can check by running >dotnet --info from the commandline

[bugoutfr]

Everything is installed correctly, I expect I wouldn't have been able to launch a debug session in the first place otherwise. Here's a part of the console output:

.NET Core SDKs installed:
  2.1.202 [C:\Program Files\dotnet\sdk]
  2.1.401 [C:\Program Files\dotnet\sdk]
  2.1.402 [C:\Program Files\dotnet\sdk]
  2.1.403 [C:\Program Files\dotnet\sdk]
  2.1.701 [C:\Program Files\dotnet\sdk]
  2.1.801 [C:\Program Files\dotnet\sdk]
  2.2.301 [C:\Program Files\dotnet\sdk]

@vijayrkn - the exception is the same as the one described: a FileNotFoundException trying to read function.json from the bin folder instead of the Function1/function.json path.
Anyway the workaround seems good enough for me now ;-) Thanks for the help!

[vijayrkn]

oh, you mean this error:

The exception occurs at ScriptHost.cs:1081

System.IO.FileNotFoundException: 'Could not find file 'C:\Repos\Solution1\FunctionApp1\bin\Debug\netstandard2.0\bin\function.json'.'

@soninaren / @fabiocav -Looks like ScriptHost.cs is looking for the file in the wrong location. Is this something you guys can fix?

[gynet]

I have the same issue, this is annoying.
As an SDK consumed by so many users, Shouldn't this kind of issues be addressed with high priority?

[CrisZis01]

I get this when running a Function App in Azure now. v2

[pinaki1234]

This issue is sporadic - the Microsoft dev team is not trying to put its due diligence in trying to reproduce the error and then fixing it. For me I recreated (and fixed the issue) the whole file structure by adding these to a blank solution but this shouldn't be the best way around.

[TNDStudios]

Have this same issue, V3 functions, 3.0.11 and it's not finding the function.json file because it is in a subdirectory named with the id of the function so

binDebugnetcoreapp3.1binfunction.json

when it is actually in

binDebugnetcoreapp3.1binnameoffunctionfunction.json