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Error "An error has occured while running the flow - System error: System error" When Running a Flow in Tableau Prep


Published: 01 May 2019
Last Modified Date: 24 Jul 2019

Issue

When running a flow in Tableau Prep, the following error is displayed:

An error has occured while running the flow - System error: System error


Additionally, the logs show:

VisitTuples: not implemented

Environment

  • Tableau Prep
  • PostgreSQL

Resolution

Check for one or more of the following cleaning steps:

Option 1

  1. Check the flow for a 'Group and replace' step that replaces null with '0'
  2. Remove the Group and Replace step.
  3. Create a calculated field: IFNULL(<FieldName>,0)

Option 2

  1. Check for joins based on fields that have been renamed.
  2. Remove the renaming steps on joining fields.
  3. Delete and re-create the join step.
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