How to callproc a PL/pgSQL function a cursor OUT parameter and two OUT parameters

Hi

I have a PL/pgSQL that looks like this:

create or replace function my_function (p_cursor out refcursor, p_code out
varchar, p_message out varchar) as $$
begin
open p_cursor for
select * from table;

p_code := 'AJ001';

return;
end; $$ language plpgsql;

I've tried to invoke this function using:

cursor.callproc('schema.my_function', [ 'mycursor', code, message ])

But I get:

HINT: Ninguna funci├│n coincide en el nombre y tipos de argumentos. Puede
ser necesario agregar conversión explícita de tipos.

In english is something like No function matches the name and types of
arguments.

Any ideas?

Regards,

Néstor