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Error "Refresh failed (Unknown failure)" Refreshing Microsoft SQL Server Extract on Tableau Server

Publiseringsdato: Feb 23, 2026
Beskrivelse
Scheduled extract refreshes of Microsoft SQL Server data source might fail on Tableau Server, and the following error might appear in the background tasks view:
 
Refresh failed (Unknown failure) Tableau Data Engine Error: 4: SimpleDatabase::SelectMetadataName: expected found=1, actual found=0 (fk=18446744073709551615 name="Extract" nameTable="SCHEMAS")
 
When trying to refresh the extract on Tableau Desktop, the refresh succeeds.

Cause

The necessary Microsoft SQL Server driver is not installed on the computer running Tableau Server.
Løsning
On the computer running Tableau Server, download and install the Microsoft SQL Server driver from the Drivers & Activation page.
Flere ressurser

Steps to connect Tableau to a Microsoft SQL Server database and set up the data source :

https://help.tableau.com/current/pro/desktop/en-us/examples_sqlserver.htm

Knowledge-artikkelnummer

001473824

 
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