Raise error in a trigger

Question

Hi
I have a question about a trigger.
The purpose of this trigger is to prevent modifications being made to a record.
TRIGGER AR_APPLICATIONS_ARU BEFORE UPDATE OF DISPLAY ON AR.AR_RECEIVABLE_APPLICATIONS_ALL
FOR EACH ROW
DECLARE
e_ERRORNAME EXCEPTION;
e_TEST EXCEPTION;
PRAGMA EXCEPTION_INIT(e_TEST, -06512);
BEGIN
   IF (:NEW.DISPLAY = 'N') AND (:OLD.DISPLAY= 'Y') AND ((:OLD.ATTRIBUTE13='PAYED') OR (:OLD.ATTRIBUTE13='PAID'))
    THEN
     RAISE_APPLICATION_ERROR(-20001,'-----------Test foutmelding!-------------');
   END IF;
END;This trigger shoots when it should, but I get also other error messages:
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
ORA-06512: at "APPS.FND_MESSAGE", line 581
ORA-06512: at "APPS.FND_MESSAGE", line 537
ORA-06512: at "APPS.APP_EXCEPTION", line 42
ORA-06512: at "APPS.ARP_APP_PKG", line 681
ORA-20001: -----------Test foutmelding!-------------
ORA-06512: at "APPS.XXABET_AR_APPLICATIONS_ARU", line 17
ORA-04088: error during execution of trigger 'APPS.XXABET_AR_APPLICATIONS_ARU'
ORA-06512: at "APPS.ARP_PROCESS_APPLICATION", line 522
FRM-40735: ON-UPDATE trigger raised unhandled exception ORA-06502.What do I do wrong, or how can I suppress those messages?

Answer 1

this works for me:
create table ar_receivable_applications_all (display varchar2(1), attribute13 varchar2(10));
  1  create or replace TRIGGER AR_APPLICATIONS_ARU BEFORE UPDATE OF DISPLAY ON
  2  AR_RECEIVABLE_APPLICATIONS_ALL
  3  FOR EACH ROW
  4  when (old.attribute13 in ('PAYED','PAID'))
  5  BEGIN
  6     IF :NEW.DISPLAY = 'N' AND :OLD.DISPLAY = 'Y'
  7      THEN
  8       RAISE_APPLICATION_ERROR(-20001,'-----------Test foutmelding!-------------');
  9     END IF;
10* END;
SQL> /
Trigger created.
SQL> insert into ar_receivable_applications_all values ('Y','PAID');
1 row created.
SQL> commit;
Commit complete.
SQL> update ar_receivable_applications_all set display='N';
update ar_receivable_applications_all set display='N'
ERROR at line 1:
ORA-20001: -----------Test foutmelding!-------------
ORA-06512: at "WEBPROD.AR_APPLICATIONS_ARU", line 4
ORA-04088: error during execution of trigger 'WEBPROD.AR_APPLICATIONS_ARU'
SQL>