Error "Unknown Data Source Class 'sqlproxy'" Opening Workbook

Published: 06 Jun 2016
Last Modified Date: 27 Jul 2018


When opening a workbook downloaded from Tableau Server in Tableau Reader, the following error might occur:

Unknown data source class 'sqlproxy'.


  • Tableau Server
  • Tableau Reader
  • MySQL data source


Extract the data from the data source prior to opening the workbook in Tableau Reader:
  1. Download the workbook from Tableau Server and open it in Tableau Desktop.
  2. Extract the data. For more information, see Extract Your Data.
  3. Save the workbook as a .twbx file.
  4. Open the file from Tableau Reader again.


The workbook is using a live connection to a data source, or using a live connection to a data source published to Tableau Server (live or extracted). Tableau Reader cannot open workbooks or .twbx files that use a live connection to data.
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