Triggers - 00406 error (COMPATIBLE parameter)

Question

I created a DDL - level trigger =
'create trigger prev_drop
before drop or truncate on kd.schema...'
which prevents anyone from droppping or truncating tables owned by the user 'kd'
with names starting from 'led'.
Upon compilation of the same i get the error
'ORA-00406 COMPATIBLE parameter needs to be string or greater'
Can anyone help me with this error.
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Answer 1

Are you asking how to determine what parameters are in 10.2.0.3 that were not in 9.2.0.7?
I've not seen any documentation on this so my instinct would be a database link and then a variation on the following query:
set pagesize 35
set linesize 150
col NAME format a30
col VALUE format a20
col DESCRIPTION format a60
set pause on
set pause 'Hit enter to continue'
SELECT x.ksppinm NAME, y.ksppstvl VALUE, ksppdesc DESCRIPTION
FROM x$ksppi x, x$ksppcv y
WHERE x.inst_id = userenv('Instance')
AND y.inst_id = userenv('Instance')
AND x.indx = y.indx
AND SUBSTR(x.ksppinm,1,1) ^= '_'
ORDER BY 1;for undocumented parameters and just a straight MINUS set query from gv$parameter for those that are documented.