KNOWLEDGE BASE

Error "System error: null" when running a flow which uses Custom SQL in Tableau Prep


Published: 19 Nov 2018
Last Modified Date: 24 Jan 2019

Issue

When running a flow which joins input nodes from Custom SQL in Tableau Prep, the following error might occur:

"System error: null"

or

"System error: com.tableau.loom.exceptions.OutputNodeFailureException: Unable to process output step: Failure loading Data Source: Internal Error - An unexpected error occurred and the operation could not be completed."

Environment

  • Tableau Prep

Cause

This behavior is related to known issue ID 845634 and was resolved in the 2019.1.1 release of Tableau Prep, and all more recent versions.

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