Error 6EA18A9E Occurs When Unioned Tables Are Joined with Other Tables on Versions Before 2021.1

Published: 03 Aug 2021
Last Modified Date: 04 Aug 2021


When joining a table with a unioned table using relationship, Then error occurs:

Unable to complete action
Internal Error - An unexpected error occurred and the operation could not be completed.
Error Code: 6EA18A9


  • Tableau Desktop 2020.4 and older


The workarounds are as follows:

Option 1: 
Use an Extract instead of live connection when setting relationships with unioned tables in versions 2020.4 and older.

Option 2:
Upgrade to and use Tableau Desktop 2021.1 or later.


This could be by design as Tableau did not support setting relationships with unioned tables on versions earlier than 2021.1.
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