Code Coverage Results periodically gives: Empty results generated

Question

I've run into a recurring problem with a few different projects using MSTest in VS2012, where every now and then my code coverage stops working (seemingly at random) and instead gives me:

Empty results generated: No binaries were instrumented. Make sure the tests ran, required binaries were loaded, had matching symbol files, and were not excluded through custom settings. For more information see http://go.microsoft.com/fwlink/?LinkID=253731

I've checked the obvious (what it's suggested) but can't seem to figure out what is causing it.

Here is my runsettings file:

<?xml version="1.0" encoding="utf-8"?>
<RunSettings>
  <DataCollectionRunSettings>
    <DataCollectors>
      <DataCollector friendlyName="Code Coverage"
                     uri="datacollector://Microsoft/CodeCoverage/2.0"
                     assemblyQualifiedName=" Microsoft.VisualStudio.Coverage.DynamicCoverageDataCollector, 
                                             Microsoft.VisualStudio.TraceCollector, 
                                             Version=11.0.0.0, 
                                             Culture=neutral, 
                                             PublicKeyToken=b03f5f7f11d50a3a">
        <Configuration>
          <CodeCoverage>
            <ModulePaths>
              <Include>
                <ModulePath>.*\.dll$</ModulePath>
              </Include>
              <Exclude>
                <ModulePath>.*\.tests.dll</ModulePath>
              </Exclude>
            </ModulePaths>
            <Attributes>
              <Exclude>
                <Attribute>.*ExcludeFromCodeCoverageAttribute$</Attribute>
                <Attribute>.*GeneratedCodeAttribute$</Attribute>
              </Exclude>
            </Attributes>

            <UseVerifiableInstrumentation>True</UseVerifiableInstrumentation>
            <AllowLowIntegrityProcesses>True</AllowLowIntegrityProcesses>
            <CollectFromChildProcesses>True</CollectFromChildProcesses>
            <CollectAspDotNet>False</CollectAspDotNet>
          </CodeCoverage>
        </Configuration>
      </DataCollector>
    </DataCollectors>
  </DataCollectionRunSettings>
</RunSettings>

Answer 1

I just ran into this using Visual Studio 2019. The solution was to go to the "Test" menu item in VS and then update the Test -> Processor Architecture for AnyCPU Projects setting from X86 to X64.