Package Function Runs OK in Database but fails inside a Mapping

Question

Dear Forum,
I am stuck with an Odd Problem. I have a package.function that calculates a value using another function PNV and uses this value to update a table named F_CONTAGENS. When I run the function in the database (using SQLDeveloper) the function calculates the value and updates the column NUM_PNV_2_ANOS in table F_CONTAGENS.
No errors . But when I run the function inside an OWB Mapping, the function returns 'NULL' and do not update the table. What could be the problem?! The mapping that uses this function is very simple: Function is connected to an Auxiliar Table (with INSERT option) that receives the value returned by the function (in this case 1). Both function's package and the mapping were already deployed without errors to the database
Here is the function I am using (COD_MES := 200702) :
CURSOR C_CONT IS
SELECT C.COD_USF,
C.COD_MES
FROM F_CONTAGENS C
, STG_DATA_CARREGAMENTO STC
WHERE C.COD_MES = STC.COD_MES
AND ((C.COD_USF = STC.COD_CARREGAMENTO_USF AND STC.COD_CARREGAMENTO_USF IS NOT NULL) OR STC.COD_CARREGAMENTO_USF IS NULL);
BEGIN
FOR R_CONT IN C_CONT LOOP
UPDATE F_CONTAGENS
SET NUM_PNV_2_ANOS =
(SELECT SUM(PNV)
FROM (SELECT DECODE(F_PNV(COD_UTENTE,R_CONT.COD_USF,R_CONT.COD_MES,SUBSTR(R_CONT.COD_MES,1,4)), 'N', 0, 1) AS PNV
FROM (SELECT DISTINCT COD_UTENTE
FROM D_UTENTE
WHERE DATA_NASC >= ADD_MONTHS(R_CONT.COD_MES||'01', -24)
AND DATA_NASC <= ADD_MONTHS(last_day(R_CONT.COD_MES||'01'), -24)
AND MES_UTENTE = R_CONT.COD_MES
AND COD_USF = R_CONT.COD_USF))
WHERE COD_USF = R_CONT.COD_USF
AND COD_MES = R_CONT.COD_MES;
COMMIT;
END LOOP;
RETURN 1;
EXCEPTION
WHEN OTHERS THEN
NULL; -- enter any exception code here
RETURN NULL;
END;
Is the OWB not synchronized with the DB? Does any of you alredy experienced this situation?
Thank you very much for your attention,
Pedro.

Answer 1

HI Pedro,
if your function returns null then some exception has occured.
Do not catch the exception in your function, then you will see it when you run the mapping.
Maybe you run the mapping using a different db user than when running it directly? In that case some grants will help.
The exception will tell you the reason.
Regards,
Carsten.