MATCHES and complex queries

Question

I get an error message when trying to
execute the instructions bellow
create table publications
public_id number,
title varchar2(200),
constraint publications_pk
primary key(public_id)
create table profiles
profile_id number,
rule varchar2(500),
constraint pro_pk
primary key(profile_id)
I create a ctxrule index
create index profile_index on profiles(rule)
indextype is CTXSYS.CTXRULE;
I issue queries like this one
select profile_id from profiles
where (matches(rule,' etc .. ')>0)
or (title_rule is NULL)
or like this
select profile_id from profiles
where (matches(rule,' etc .. ')>0)
and (profile_id<10)
and get the error
ERROR at line 1:
ORA-20000: Oracle Text error:
DRG-50610: internal error: MATCHES does not support Functional Invocation

Answer 1

Actually the error only happens when this query
is issued inside a cursor loop and a stored procedure
like this one
create or replace procedure match(doc_num in number) as
document publications%rowtype;
begin
select * into document
from publications
where public_id=doc_num;
for matched_profile in (
select profile_id from profiles
where (matches(rule,document.title)>0)
and (profile_id<10)
loop
/*Other Code to type the matched profile*/
end loop;
end;
The code is syntactically correct
but causes runtime error.
The version of Oracle is use is 9.2.0.1