KNOWLEDGE BASE

Error: “Cannot read property ‘isInstanceOfType’ of undefined” When using the JavaScript in 2019.3.0


Published: 23 Sep 2019
Last Modified Date: 24 Sep 2019

Issue

When using the JavaScript in 2019.3.0, the following error might occur when using the tableau-2.js file, which is the un-minified version after upgrading to version 2019.3.0:

“Cannot read property ‘isInstanceOfType’ of undefined”

Environment

  • JavaScript in 2019.3.0 (specifically using the un-minified version tableau-2.js file)
  • Tableau Server

Resolution

Use the minifed version tableau-2.min.js. For additional information, see Access the API in Tableau Help. 

Cause

This issue (ID: 927821) is being investigated. 
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