title: Formulas within a table that reference an external workbook cause warning message when updating links
body: <p>If I add a formula referencing another workbook, and the formula is within a table, the warning message "Warning: Open source to update values" is displayed when manually updating links.</p>
  
  <p>I am using Excel 2010, but I can also observe the same behavior using Excel 2013.</p>
  
  <p>Steps to reproduce the behavior:</p>
  
  <ul>
  <li>Create a workbook named A.xlsx and save it to your desktop.</li>
  <li>Create a workbook named B.xlsx and save it to your desktop.</li>
  <li>Open B.xlsx and insert a table on any spreadsheet. On any column of the table, add a formula that references A.xlsx, e.g. a formula directly refencing a cell on A.xlsx.</li>
  <li><p>On the Data tab, in the Connections group, click Edit Links. Chose A.xlsx as the source and click on "Update Values". The warning message "Warning: Open source to update values" is displayed.</p>
  
  <p>All the values seem to be updated without errors, despite the warning message.</p>
  
  <p>Question: Is this warning message spurious, or does it really indicate a failure to update the linked values in any way?</p>
  
  <p>As noted above, the values seem to be correctly updated in my tests, but the warning message is still a bit disturbing as it may indicate some issue I was not able to detect.</p></li>
  </ul>