Forum Discussion
Data source error: We're sorry, an error occurred during evaluation.
Greetings, Starting from 2PM Pacific Time on June 21st, a scheduled dataset refresh in the Power BI Service began to fail at every refresh with an "Error occurred during evaluation" message. A ...
Not sure this helps, but I had a similar error type when the design didn't change but the data set did change (of course it was a refresh so by definition the data set is changing....)
In my case I had a join between tables in what I thought was on one side a table's field that would always have unique values (key field - 1 side of a 1:Many relationship)...and did for awhile so everything worked....but upon a refresh there was a duplicate value coming in from the data source..... I had to deal with that logic error on my design as it turned out it wasn't a field to be relied upon for unique values.