title: SSIS excel source column name mismatch error
body: <p>I have an SSIS package, with Excel as the source, loading data to an OLE DB destination.</p>
  
  <p>Today it failed with the error: </p>
  
  <blockquote>
    <p>[Excel Source [1531]] Error: Column "Product Value" cannot be found at
    the datasource.</p>
  </blockquote>
  
  <p>After some effort, I realized that the column name, which used to be "Product Value", was now "Product Value ".</p>
  
  <p>The extra space at the end of the column name is causing this problem. Is there any fix for this type of error?</p>