KNOWLEDGE BASE

Prep Builder 2020.4 Unable To Open Flow File And Message "An Error Has Occurred"


Published: 14 Jan 2021
Last Modified Date: 24 Feb 2021

Issue

When opening a flow file that uses wildcard unioned files as data source with Tableau Prep Builder 2020.4.1 the following error occurs:

User-added image
The error occurs when one or more of the original input file(s) is missing.

Environment

  • Tableau Prep Builder 2020.4.1
  • Excel

Resolution

Option 1

Make sure all input files exist.

Option 2

Downgrade and use Tableau Prep Builder 2020.3.3

Cause

This behavior is related to a known issue with ID 1215529 that is currently under investigation.
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