Error rep-1401 in report 6i

Question

dear sirs,
when i run the report i got this error rep_1401 cf_2formula fatal pl/sql error occurred
known that after i trace i find that the error come because report not see the value inside the paramater :budg_type
the code is here
function CF_2Formula return Number is
cursor c1 is SELECT
to_char(A.DUE_DATE,'mm') ,
SUM(nvl (b.EST_CRAFT,0)) man,
SUM(nvl (b.EST_TOOL,0)) tol,
SUM(nvl (b.EST_SUPPLY,0)) con,
SUM(nvl (b.EST_SPARES,0)) mat,
SUM(nvl (b.EST_MISC,0)) misc
FROM PLANNING_SIMULATION A ,maintenance_plans b
WHERE A.EQUIPMENT_ID = B.equip_EQUIPMENT_ID(+)
AND A.MAINTENANCE_WORK_ID = B.mw_MAINTENANCE_WORK_ID(+)
AND to_number(to_char(a.due_date,'yyyy')) =:YEAR
and A.EQUIPMENT_ID IN (SELECT EQUIPMENT_ID FROM EQUIPMENT WHERE
               COSTCENTER_COST_CENTER_ID = :COST_CENTER)
and to_char(A.DUE_DATE,'mm') = :mon
group by to_char(A.DUE_DATE,'mm');
rec c1%rowtype;
total number(10,3);
begin
open c1;
fetch c1 into rec;
close c1;
total := nvl(rec.mat,0)+nvl(rec.con,0)+nvl(rec.man,0)+nvl(rec.tol,0)+nvl(rec.misc,0);
--if :cf_budg_type = 'material' then
if :budg_type = 'material' then
     total := rec.mat;
     return(total);
elsif :budg_type = 'contract' then
     total := rec.con;
     return(total);
elsif :budg_type = 'manpower' then
     total := rec.man;
     return(total);
elsif :budg_type = 'tool' then
     total := rec.tol;
     return(total);
elsif :budg_type = 'misc.' then
     total := rec.misc;
     return(total);
elsif :budg_type = 'totals' then
     return(total);
end if;
end;
when i make hash for the if statement it work without problem, please advice me how to solve this and why if statement not feel what inside the paramter even i try to print the contents of paramater and it was ok
help me pls
Yasser

Answer 1

I think the problem is that
to_number(interface_header_attribute1)fails when there are non numeric values in interface_header_attribute1.
You could write a stored function in the database for converting char-values to number-values.
These function should catch the conversion errors and return an appropriate default (or null).
You then could use your own function instead of buildin to_number-function.
Edited by: hm on 05.09.2011 01:25