title: IsNa Sub or Function Not Defined
body: <p>I Know this is silly but I still can't find the answer after an hour of searching.</p>
  
  <p>I'm trying to determine if a value(Customername) is an NA; I've tried the following 2 methods</p>
  
  <pre><code>Customername = Worksheets("Request").Range("E5")
  If IsNA(Customername.value) = True Then CustomerN = 1
  CustomerN = Ifna(Customername,1)
  </code></pre>
  
  <p>Both lines return errors stating "Sub of Function not defined". Whats frustrating is it recognizes the functions because it changes the capitalization, but it still breaks. I've tried dimming CustomerName as different types but doesn't seem to matter.</p>
  
  <p>If you could explain the error in my thought process I'd appreciate it.</p>