Validation Handler not showing prop.error content

Products

• CA Identity Manager
• CA Identity Governance
• CA Identity Portal

Issue/Introduction

When submitting task from Identity Portal, in spite of code inside the Validation Handler, Identity Portal is not showing the exact text from prop.error, but rather gives a default "Validation Error" text.

We are using prop.error as per example from the Identity Portal Documentation.

Environment

Release:
Component: SIGMA

Resolution

It exist within the CA Identity Portal Guide an incorrect statement regarding custom message in "Form Handler Examples"
https://techdocs.broadcom.com/us/en/symantec-security-software/identity-security/identity-portal/14-4/administrating/identity-portal-administration/elements/backend/create-forms.html 

Where the Validate Handler example refers to :

prop.error = "Invalid object name: " + prop.value;

However, error messages are handled within an array through prop.errors as documented within the Hotel Reservation Form Example
https://techdocs.broadcom.com/us/en/symantec-security-software/identity-security/identity-portal/14-4/programming/developer-guide/form-handlers/hotel-reservation-form-example.html 

prop.errors = [result.returnValue];

So custom message can be set with :

prop.errors.push("Here is custom error message from Validate Handler"); 
or
prop.errors = ['Here is custom error message from Validate Handler'];