Internal Error when adding a datasource to canvas and selecting "Create Join Calculation"

KNOWLEDGE BASE

Internal Error when adding a datasource to canvas and selecting "Create Join Calculation"

Published: 30 Oct 2019
Last Modified Date: 08 Jul 2022

Issue

When there are fields having the same names already in data source, then adding another data source to canvas and selecting "Create Join Calculation", following error occurs.

Internal Error - An unexpected error occurred and the operation could not be completed.

Environment

Tableau Desktop 2019.3.1

Resolution

Option 1
Change names of fields manually, to make sure there is no fields having same names.

Option 2
Upgrade to 2019.3.6, 2019.4.5 or later version.
For existing workbooks with the issue, you still need to apply Option 1.