Hi
I too faced similar issue. However later identified that if I use
'HR_IN_CHG_INR_WRDS' with larger amount say 1000 Crore...then it is not doing anything but returns blank...
However, I replaced the function with 'SPELL_AMOUNT' .. Then it works fine. for any larger amount.
So, I would suggest to use 'SPELL_AMOUNT' instead of 'HR_IN_CHG_INR_WRDS' .
Regards,
Venkat