Error "Bad Connection ... InsertData: Unbound Column Unable to Properly Calculate the Domain For the Field"

Published: 29 Nov 2018
Last Modified Date: 18 Dec 2018


When opening the data source tab of an unpackaged workbook (.twb) with a connection to Excel, the following error occurs:

Bad Connection: Tableau could not connect to the data source. InsertData: unbound column Unable to properly calculate the domain for the field '<Field Name>'. Displayed data may be incorrect


  • Tableau Desktop 2018.2.0
  • Windows 7
  • Excel


  1. Create a copy of the Excel file. 
  2. Replace data source in your workbook and connect to the new file. 


The Excel file is corrupted.

Additional Information

Troubleshooting tests to verify if this article applies:
  • If the workbook is saved as a packaged workbook, the error does not occur.
  • Another workbook connected to the same Excel file has the same error
  • The error does not occur when connecting to a copy of the original Excel file.
Did this article resolve the issue?