Authentication Error: "FATAL 3871 Invalid username or password." When Using a TDC File with Vertica

Published: 12 Jul 2016
Last Modified Date: 18 Oct 2016


After implementing a .TDC file for Vertica on Tableau Server, the data connection to the Vertica server may no longer be working properly. Issue may be presented in a few different ways:
  • Viewing dashboards published to Tableau Server prompts to log into Vertica database and credentials are not accepted.
  • Embedded passwords do not appear to be persisting after publishing to Tableau Server.
  • Unable to refresh any extract using a .tdc file with Vertica. Error message "FATAL 3871 Invalid username or password


  • Tableau Server
  • Vertica
  • TDC files


Review the .TDC files for possible syntax errors or misspellings. If there is any difference between the two .TDC files, there will be authentication errors. For more information about Vertica Integration with Tableau 10, see the Tips and Techiques documentation.


The required TDC file is missing from Tableau Desktop, or the TDC file on Tableau Desktop differs from the TDC file on Tableau Server.
Did this article resolve the issue?