Error "The form is referencing a field that does not exist. Please notify the form designer."

  • 26 March 2021
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ISSUE
When opening or running a Nintex Task Form, the following error might occur:

The form is referencing a field that does not exist. Please notify the form designer.
ERROR CODE
The form is referencing a field that does not exist. Please notify the form designer.
RESOLUTION
  • Use Runtime Function "isNullOrEmpty" to check the value of "TaskOutcome". For instance: isNullOrEmpty(TaskOutcome).
  • Make sure the "TaskOutcome" control has a default value If "isNullOrEmpty" does not apply.
  • When the field "Default value source" in "Task Outcome" choice control setting has been set to "Specify default value", make sure that "Default value" is not blank/empty. 
    The end user can populate this with double quotes/speech marks and space i.e (" ") 
    This is based on the business requirement of not having any value set on the outcome.
  • Ensure that when using a workflow variable that is connected to a control, if the variable name is changed you must re-bind the variable to control.
ADDITIONAL INFORMATION
There are more than one possibility as the root cause of the issue: 
  • This issue occurs because one of the Rules that is using 'Task Outcome' is empty or does not have the default value. 
  • This issue occurs because the Task Outcome control configuration of: 'Specify default value' > 'Default value'  is set to blank / with no value.
  • If a workflow variable connected to a control is renamed or deleted, and the form control’s “Connected to” is not updated to account for the change, the form will generate the error listed.
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