I have a datasource which is a csv file. The file is imported and then published to Tableau Online.
Then I opened the online data source and chose data->data source->tableau server->append from file.
I chose the file that contains the additional data.
At the end it fails due to Tableau Data Engine Error: 4: Dataflow::GetColumn: MyComputedColumnName (copy).
The crazy thing is I only have one column MyComputedColumnName. There is no copy (also not hidden or something like that).
Also when I point to the file that was the original file (ensuring it is exactly the same data) it still fails.
What could be the case here?
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