Hello everyone

I've got problem when trying to index my table using indextype ctxsys.context. Every I create an index it always appear an error message like this :

create index myindex on published(dok)
*
ERROR at line 1:
ORA-29855: error occurred in the execution of ODCIINDEXCREATE routine
ORA-20000: Oracle Text error:
DRG-50857: oracle error in drixtab.create_index_tables
ORA-00955: name is already used by an existing object
ORA-06512: at "CTXSYS.DRUE", line 157
ORA-06512: at "CTXSYS.TEXTINDEXMETHODS", line 186

This is my table :

create table published (
published_id varchar2(11) primary key,
department_id varchar2(3),
journal_id varchar2(9),
susunan number,
count number,
namadoc varchar2(80),
dok clob
);

n I insert record using :

DECLARE
f_lob BFILE;
c_lob CLOB;

BEGIN
INSERT INTO published(published_id,department_id,journal_id,su sunan,count,namadoc,dok)
VALUES ('INF99010101','INF','INF990101',1,0,'\Infor\Vol-1\Nomor 1\nas-1new.doc',EMPTY_CLOB())
RETURN dok into c_lob;

f_lob := BFILENAME('MY_DIR','\Infor\Vol-1\Nomor 1\nas-1new.doc');
dbms_lob.fileopen(f_lob,dbms_lob.file_readonly);
dbms_lob.loadfromfile(c_lob,f_lob,dbms_lob.getleng th(f_lob));
dbms_lob.fileclose(f_lob);
commit;
END;

Is there any problem in my ORACLE setting because my lecturer said that my ORACLE has a problem, I using Oracle Text 9.2 in Oracle 9i

Thanx