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Support Article

Screen freezes on click of a button in PRPC 7.4



After closing a Screenflow case type, unable to create a new case.

Error Messages

Uncaught TypeError: Cannot set property 'value' of undefined

Steps to Reproduce

  1. Add a button that is configured to Add New Work.
  2. Add a screen flow for the assignment with a Start shape and which has Allow errors selected.

Root Cause

A defect in Pegasystems’ code or rules.
When the tabbedscreenflow is launched, the tabscreenflow Validation rules override the default Validation functions. Thus, a conflict is created if the screenflow is not completed; and the user reverts to the other Harness and performs a form Submit operation.


Perform the following local-change:
  1. Create a script in the UserWorkForm as below.

      function reAssigndisplayvalidation(){
        console.log("Reassiging validations");
        validation_displayErrors = temp_validation_displayErrors;

  2. Add the below function in the Harness script which is a non-screenflow harness.

    if(typeof validation_displayErrors!= "undefined" && !=="addErrorsToClipboard"){
      console.log("Loading harness scripts");
      temp_validation_displayErrors = validation_displayErrors;

  3. On Click of a button, create a new work item.
  4. In the action set, configure a Run script and invoke the function defined in Step1.

Published January 6, 2020 - Updated December 2, 2021

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