Tableau error: Invalid expression, cannot be unaggregated -


i've created tableau tde file i've been using regularly- when when doing totally normal data query view data icon hit "underlying data" tab error message "an error occurred while loading data" offers "show details" button. when button selected get: invalid expression, cannot unaggregated- know why happening?

error when requesting underlying data

shown details of previous error

digging on tableausoftware.com forum, found sets lead error. had created couple of sets in workbook prior issue. once sets deleted- things worked again. able see underlying data.


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