Error "No such function == that takes arguments of type (none, str)" When Using Different Versions of Tableau Server and Tableau Desktop

Published: 06 May 2019
Last Modified Date: 13 May 2019


When connecting to a data source published to Tableau Server 10.3 and creating a calculated field using a user function, then receiving the error:

An error occurred while communicating with the data source.

The filtering operation did not complete successfully because of an unexpected error.

No such function == that takes arguments of type (none, str)


  • Tableau Desktop 2018.2 or 2018.1
  • Tableau Server 10.3


This issue is currently under investigation.
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