Create index intermittent deadlock problem

Hi. Apologies but I'm a newbie to Oracle Text. I have a batch process which occasionally (twice so far) falls over with:
ORA-29855: error occurred in the execution of ODCIINDEXCREATE routine
ORA-20000: Oracle Text error:
DRG-50857: oracle error in drekmap (lob write)
ORA-00060: deadlock detected while waiting for resource
ORA-06512: at "CTXSYS.DRUE", line 157
ORA-06512: at "CTXSYS.TEXTINDEXMETHODS", line 204
This is when trying to create a multi_column index defined as
BEGIN
CTX_DDL.CREATE_PREFERENCE('mikec_test', 'MULTI_COLUMN_DATASTORE');
CTX_DDL.SET_ATTRIBUTE ('mikec_test', 'columns',
'title, result_text, location, origin, inc_details');
END;
The create index is:
CREATE INDEX schema.idx_freetext_new
ON schema.freetext_search_new(title)
INDEXTYPE IS CTXSYS.CONTEXT
PARAMETERS ('datastore ctxsys.mikec_test');
Most of the time the above works fine. I'm using Oracle 9.2.0.4 on a SunOS 5.8 machine. Could anyone please give me a hint how/where to start tracking this deadlock down? Should I specify tablespace storage for the i/k/n/r thingummies? Is it something I need to get a patch for? Oracle 10/11?
Many thanks.

Starting places:
select * from ctxsys.ctx_index_errors;
check your alert log
turn tracing on and check trace file
search metalink for drekmap

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Edited by: 906314 on 7.3.2012 4:01

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SQL> SELECT score(1), sortname FROM CUSTOMER where CONTAINS(sortname, 'fuzzy({Hamlberg Ulf}, 50, 10, weight)',1) > 0;
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SQL> SELECT score(1), sortname FROM CUSTOMER where CONTAINS(sortname, 'fuzzy({Hamlberg, Ulf}, 50, 10, weight)',1) > 0;
SCORE(1) SORTNAME
        44 Hamlberg, UlfIs this different from what you see? If so, please show a complete session (as I have) so we can check you're not doing anything wrong.
I don't understand your:
select * from CUSTOMER where contains(sortname,'Ulf') > 0; -- "Hamlberg, Ulf" is returned - NOT OK - Why it is not returned ??
Do you mean "why is it returned?" It's because the "contains" operator matches any word in the original text. That's the whole point of it.

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