FORMS - FRM-40735 ERROR

Question

Hi.
I've created a new application which provides the customer's commercial analysis. There are 3 text-items in my form where user fill them with the following: Establishment, Customer_id and the Period(in days) for the consulting.
After that the 'key-next-item' trigger calls my procedure 'update_details' in which I've put a common 'select' that'll provide the customer first sales date. Although I've faced troubles with this procedure.
The form doesn't run out correctly. It raises the FRM-40735 for the user and when it runs by debug mode raises:
'PDE-PXC002 Program unit execution aborted due to unhandled exception(1722).' Why is it? Could someone help me?
Following the Select Code:
BEGIN
SELECT MIN(sales_date)
INTO :first_sales_date
FROM sales
WHERE (esb_cod = :esb and
cust_id = :cust);
END;
Thank you,
Anderson

Answer 1

What's the error message the user is getting? FRM-40735 is not enough. We need the text of the error message:
FRM-40735: ..... trigger raised unhandled exception ......
The important bits are the name of the trigger that failed and more importantly what the unhandled exception was.
I can see two possible things going wrong with your code:
TO_DATE(SYSDATE) might go wrong. SYSDATE is already a date, so there is no need to do a TO_DATE function again. In fact, it's probably causing an implicit conversion from SYSDATE to a string and then converts the string back to a date.
The other thing is the TO_DATE('09/14/2001'). It's dangerous to do a TO_DATE without a format mask. If your session runs in European settings this will lead to errors since there is no 14th month.
It's best practice (and much clearer for other developers) to include a format mask:
TO_DATE('09/14/2001','MM/DD/YYYY')