[...] In addition, note that if you use ByTable, you will see duplicate member messages when processing the dimension [...] In this scenario, these duplicate error messages are false positives resulting from the fact that
the SQL statement is no longer returning a distinct set of members for each attribute. To better understand how these duplicates occur, consider the following example.
You have a customer dimension table that has three attributes: customer key, customer name, and gender. If you set the Processing Group property to ByTable, one SQL statement is used to extract all three attributes. Given the granularly of the SQL statement, in this scenario, you will see duplicate error messages for the gender attribute if you have set the KeyDuplicate property to raise an error. Again,
these error messages are likely false positives; however, you should still examine the messages to ensure that there are no unexpected duplicate values in your data.
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