Well, the error message should give you the name of the constraint or index causing the problem: ORA-00001: unique constraint (OWNER.NAME) violated OWNER = index or constraint owner NAME = index or constraint name If you don't get the full error message, look for unique indexes / constraints on the table: select a.owner, a.constraint_name, a.constraint_type, b.column_name from dba_constraints a, dba_cons_columns b where a.owner = '&table_owner' and a.table_name = '&table_name' and a.constraint_type in ('P', 'U') and b.owner = a.owner and b.constraint_name = a.constraint_name order by a.owner, a.constraint_name, b.position ; select a.owner, a.index_name, a.index_type, b.column_name from dba_indexes a, dba_ind_columns b where a.table_owner = '&table_owner' and a.table_name = '&table_name' and a.uniqueness = 'UNIQUE' and b.index_owner = a.owner and b.index_name = a.index_name order by a.owner, a.index_name, b.column_position ; If that still doesn't solve the problem, then you need to start looking at triggers on the table to see if they are causing the error. ________________________________ De : oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] De la part de Sanjay Mishra Envoyé : mardi, 6. mars 2007 11:50 À : oracle-l@xxxxxxxxxxxxx Objet : Urgent-ORA0001 Unique COnstraint Hi I had to load some big data into the table and it has a composite Primary Key. I had disabled the Primary Key and when trying to insert the data, it is still failing with the Constraint violation Thanks ________________________________ Don't get soaked. Take a quick peek at the forecast <http://tools.search.yahoo.com/shortcuts/?fr=oni_on_mail&#news> with theYahoo! Search weather shortcut. <http://tools.search.yahoo.com/shortcuts/?fr=oni_on_mail&#news>