Personalization to Popup Error Message on Exchange Rate field on Foreign Invoices if null

https://aporaclepayables.blogspot.com/2017/07/personalization-to-popup-error-message.html

Personalization to Popup Error Message on Exchange Rate field on Foreign Invoices if null

WHEN-VALIDATE-RECORD
INV_SUM_FOLDER

:INV_SUM_FOLDER.INVOICE_CURRENCY_CODE <> 'PKR'
and :INV_SUM_FOLDER.RATE_DSP is null

Message:

Error: Please Enter Exchange Rate Information