title: Replace Null value with string in ssrs expression
body: <p>I have a row  group of STATUS fields. There is a group that returns null that I would like to change to chat. I have tried:</p>
  
  <pre><code>=Iif(IsNothing(Fields!STATUS.Value), "Chat", Fields!STATUS.Value)
  </code></pre>
  
  <p>but the group still returns blank. Would anyone have any ideas on how to help me resolve this?</p>