title: Troubleshooting Visual Studio 2019 Code Map errors
body: <p>I have a Visual Studio 2019 (16.5.4) solution with about 10 .Net Core projects, some are <code>netcoreapp3.1</code> others are <code>netstandard2.0</code>. Some have project references to the other projects, most have NuPkg dependencies.</p>
  
  <p>If I attempt to generate a Code Map from the solution, most projects render as expected in in the map, while 2 projects render with a red X next to the assembly name with no ability to expand the node.</p>
  
  <p><a href="https://i.stack.imgur.com/RxtQI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RxtQI.png" alt="Error Node"></a></p>
  
  <p>I have no idea what the Code Map doesn't like. At first I thought it was the <code>netcoreapp3.1</code> but I tried adding a new project of that time and it renders fine.</p>
  
  <hr>
  
  <p>EDIT:
  After trying to create a simple project to reproduce the issue, i've narrowed it to the inclusion of this package reference:</p>
  
  <pre><code>&lt;ItemGroup&gt;
    &lt;PackageReference Include="Microsoft.NET.Sdk.Functions" Version="3.0.5" /&gt;
  &lt;/ItemGroup&gt;
  </code></pre>
  
  <p>So, there is something in this library that's causing the map to crash?</p>
  
  <hr>
  
  <p><strong>Is there some log file or other telemetry that I can use to help troubleshoot this issue so I can revise the projects to generate a successful map?</strong></p>
  
  <p>Thanks</p>
  
  <p>-John</p>