Moved this to our Server section in the hopes that someone has a bit more info.

-Diego

Hi Slavi,

If you open the workbook locally in the Tableau Desktop for editing /for any changes

then there will two possibilities on the data source level...1.Either it can uses the Local extract files as data source..2. if you have published the Extract file to the tableau server already then it will be placed in the Tableau fast data engine and you can connect that server as source..

Publishing Data Sourceshttp://onlinehelp.tableausoftware.com/current/pro/online/mac/en-us/publish_datasources.html

If you are using two data sources in the same workbook then make sure that the data blending happening correctly or not.?

The data blending can happen on the Server data sources or local data sources in the Tableau desktop

Data Blending with Tableau Server Data Sources | Tableau Softwarehttp://kb.tableausoftware.com/articles/knowledgebase/data-blending-with-server-data-sources

Please share more insights on the problem you are facing ..so that we can help you better..

Thanks,

Sreenivas Kona