I'm continually running into this error in cloud prep. There's no information available online about this error or how to troubleshoot it.
Data sources are primarily published SQL tables from Oracle, Syspro, Syteline Infor, and excel based files on Sharepoint
This has been plaguing me today. There are two primary errors which appear in alternating order.
1) The problem can be tracked back to a specific data source (by clicking back through the clean steps eventually you end up at the data source where the error is being thrown
2) Error messages rotate between "System error: An error occurred while communicating with the data source. No such column [______]." OR " TableauException: Table does not exist. Need to rematerialize"
3) So it is telling me there is a data source problem since that's where the error originates from.
4) When I add the *SAME* data source as shown in the screenshot, modify it the same way as the original data source (same dimensions/measures removed, the same filters applied if applicable, etc) the error DISAPPEARS. Yes, replacing the data source with the same data source resolves the error.
Clearly this a is a bug
