title: Conversion error with read_excel for dtype=str using pandas, python
body: <p>I am reading an excel file using pandas in python and it works for some files and for some others it throws the following error "Unable to convert column DESCRIPTION to type " where DESCRIPTION is one of the many columns of the excel. I cannot see any difference between the excels for which it works for the ones it doesn't. </p>
  
  <p>when I read it without dtype=str, it works just fine, but I need to read it as a string.</p>
  
  <pre><code>df = pandas.read_excel(fileFullPath, dtype=str)
  </code></pre>
  
  <p>Any help with this error solving this error will be helpful.</p>