SQL & PL/SQL :: PLS-00653 - Aggregate / Table Functions Not Allowed In Scope?

I have a function that returns the situation for one month for some database. I need to implement it in some report medium for one year. The one year function works ok.

My problem is when trying to make another function that runs the monthly function 12 times and that error is "PLS-00653: aggregate/table functions are not allowed in PL/SQL scope".am trying to get around some restrictions and somehow until this part things seem to be ok.

I tried to use a union with 12 blocks but it works very slow in the reporting environment and now i want to try to make another function that runs another function 12 times depending on the parameter.

here is the code (there might be some name misuse since i had to change the names of the original code -

CREATE OR REPLACE
FUNCTION anual(monthh in varchar2, year IN VARCHAR2)
return anual_REP_var PIPELINED is
BR anual_REP:=anual_REP(NULL,NULL, NULL,NULL);
contor INT(2);

[code]...