Error "data source is not supported in Tableau Desktop"

Published: 16 Apr 2021
Last Modified Date: 22 Apr 2021


When opening a workbook that uses a legacy Excel or text data source in Tableau Desktop 2020.2 or newer, the following error may occur:

Dashboard Unavailable
The "
<data source name>" data source is not supported in Tableau Desktop.


  • Tableau Desktop 2020.2 or newer
  • Excel
  • Text file


To resolve this issue, use one of the following options:

Option 1

Use Tableau Desktop 2020.1 or older to open the workbook.

Option 2

Upgrade the data source:
1. Click on the Data Source tab.
2. In the Upgrade Data Source dialog, click OK.
3. Navigate back to the dashboard.

Option 3

If "Error Code: 37CE01A3. Microsoft Excel (legacy) is not supported by this version of Tableau" occurs when trying to upgrade a data source, add a new data source that uses the same Excel sheet, and then replace the data source.

To resolve other issues that may arise from upgrading the data source, see Unable to Upgrade Excel or Text Files Data Source.  


Beginning with Tableau 2020.2, legacy Excel and Text connections are no longer supported.
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