Nswag: MSBuild fails with System.InvalidOperationException: Project outputs could not be located

[SirGordon]

Build log:

.NET Core SDK v2.2.300 dotnet.exe publish ProjectName.sln --configuration Test
Executing file 'application.nswag' with variables 'Configuration=Test,OutDir=bin\Test\netcoreapp2.2\'...
System.InvalidOperationException: Project outputs could not be located in 'C:\BuildAgent\work\90f916f3df1af0df\ProjectName\bin\Debug\netcoreapp2.2\'. Ensure that the project has been built.

It's always Debug in path, no matter what _Configuration_ was passed
Using the recommended configuration from https://github.com/RicoSuter/NSwag/wiki/MSBuild.

See csproj (partial):

<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>netcoreapp2.2</TargetFramework>
    <TypeScriptCompileBlocked>true</TypeScriptCompileBlocked>
    <TypeScriptToolsVersion>Latest</TypeScriptToolsVersion>
    <IsPackable>false</IsPackable>
    <SpaRoot>ClientApp\</SpaRoot>
    <DefaultItemExcludes>$(DefaultItemExcludes);$(SpaRoot)node_modules\**</DefaultItemExcludes>
    <AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>
    <Configurations>Debug;Test;Release</Configurations>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
    <DefineConstants>TRACE;DEBUG</DefineConstants>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Test|AnyCPU'">
    <DefineConstants>TRACE;TEST</DefineConstants>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
    <DefineConstants>TRACE;RELEASE</DefineConstants>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="NSwag.AspNetCore" Version="13.0.3" />
    <PackageReference Include="NSwag.MSBuild" Version="13.0.3">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
  </ItemGroup>
...
  <Target Name="NSwag" AfterTargets="Build">
    <Copy SourceFiles="@(ReferencePath)" DestinationFolder="$(OutDir)References" />
    <Exec Command="$(NSwagExe_Core22) run application.nswag /variables:Configuration=$(Configuration),OutDir=$(OutDir)" />
    <RemoveDir Directories="$(OutDir)References" />
  </Target>
</Project>

[RicoSuter]

Did you also use the configuration variable in the config file?

{
  "runtime": "NetCore22",
  "defaultVariables": null,
  "documentGenerator": {
    "aspNetCoreToOpenApi": {
      "project": "NSwag.Sample.NETCore22.csproj",
      "msBuildProjectExtensionsPath": null,
      "configuration": "$(Configuration)",

[SirGordon]

Had "configuration": null. Now works, thank you very much!

[shivanaru]

Hi @RicoSuter - With .Net core 3.1, the path to the project output is ..\project-name\bin*x64*\Debug. The aspnetcore2openapi seems to refer to \bin\debug and is missing the x64 in the path. Any way we can specify that? Thanks!

[shivanaru]

solved this by removing the x64 from the and re-checking the checkbox on Project properties UI. It moved it to different PropertyGroup.