title: "Duplicate attribute key" error when attribute is not a key
body: <p>I am getting the following error when processing a Dimension:</p>
  
  <blockquote>
    <p>Errors in the OLAP storage engine: A duplicate attribute key has been
    found when processing: Table: 'dbo_Orders', Column: 'Project', Value:
    'client service stuff'. The attribute is 'Project'.</p>
  </blockquote>
  
  <p>'Project' is an attribute of the 'Orders' dimension, but not a key. Nowhere did I indicate that the Project column is a key! I should be able to have as many duplicates as necessary, just like a first name field.</p>
  
  <p>I'm new at Analysis Services project and really need to get past the fact that SSAS is constantly complaining about duplicate values when it should be perfectly OK to have duplicate values. I'm sure this must be something simple that I'm overlooking.  </p>
  
  <p>Edit: I realize that it is possible to set <code>KeyDuplicate = ReportAndContinue/ReportAndStop</code> and it is also possible to set <code>KeyColumns</code> and <code>NameColumns</code>. But this multistep process seems very cumbersome for what would seem should be a very normal operation, like adding Address1, Address2, Address3, Firstname, Zipcode, and other fields that normally are duplicated. I can't believe this cumbersome process need to be applied to all such fields?</p>
  
  <p>Thanks in advance.</p>