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    Nintex Knowledge Base

    Error "ko is undefined" When Loading Form

    Summary
    When using custom Javascript on a form, the following error appears in a message box: ko is undefined

    Solution
    1. In the Nintex Forms Designer for the form, navigate to Form Settings.
    2. Under the Advanced tab, select the Custom Javascript includes box and add the following:
      /_layouts/15/NintexForms/ext/knockout/knockout-3.0.0.js