title: phpExcel VLOOKUP not working with multiple sheets
body: <p>I am feeling stupid today, so forgive me. PphExcel 1.8 and Php 5.5</p>
  
  <p>I am using a VLOOKUP...</p>
  
  <p>When I write it out and load the file in excel everything is good, but when I try and get the resolved value in phpExcel... in variably I get 0... which is the wrong result.
  Not sure, but maybe it is because it is on a different sheet</p>
  
  <p>the formula I am using is </p>
  
  <pre><code>=IFERROR(VLOOKUP(V3,zLOOKUPS!A2:B3,2,FALSE),zLOOKUPS!B1)
  </code></pre>
  
  <p>The value in V3 is a string and the result coming back from the lookup should be a numeric... I think it is returning 0 because that is what is in the B1 cell... but surely it should not be error-ing in the first place.</p>
  
  <p>Driving me a little bit nuts.</p>