Oracle Text 11g -Doubt

Question

Hi ,
I am new to oracle text , i have a table which has a text data in one of the column which is been context indexed, now i want to find the frequently appearing words in that column, so i am using the ctx_doc.themes() procedure to achieve it.
I have created a result table 'ctx_themes' which has query_id,themes,weight columns which will get populated after executing the ctx_doc.themes() proc, but i am facing the below error after executing the ctx_doc.themes() proc, so please help me in fixing the issue.
Error starting at line 1 in command:
begin
ctx_doc.themes('text_data_index','e_id','CTX_THEMES',1,full_themes => FALSE,num_themes=>20);
end;
Error report:
ORA-20000: Oracle Text error:
DRG-11445: rowid value is invalid: e_id
ORA-06512: at "CTXSYS.DRUE", line 160
ORA-06512: at "CTXSYS.CTX_DOC", line 210
ORA-06512: at line 2
20000. 00000 - "%s"
*Cause:    The stored procedure 'raise_application_error'
was called which causes this error to be generated.
*Action:   Correct the problem as described in the error message or contact
the application administrator or DBA for more information.
Thank You.

Answer 1

This is meant well: I wouldn't bother posting Oracle Text questions here. It's a specialised area, and not a lot of standard, general DBAs will know much about it. If you click the 'Database' link above, however, and scroll down quite a long way, you'll find a specific Forum for such queries, called 'Text'. Some geniuses in there (Barbara, especially) are extremely knowledgeable on this sort of topic.