title: Nested SSRS IIF should work (I think) but doesn't
body: <p>I believe this code should work but I keep getting #Error</p>
  
  <pre><code>=IIF(Fields!MonthMiddleDates8.Value &lt;&gt; "", "TRUE",
       IIF(Fields!MonthMiddleDates9.Value &lt;&gt; "", "TRUE", "FALSE"))
  </code></pre>