Hi: I have a PostgreSQL 7.2.2 database since 2 years working right until now. When I try to delete a row from pgAdmin II , I get the message " ....cannot uniquely identify, 2 rows match....." If I go on deleting the row, the 2 ones are deleted. Of Course the 2 rows don't match. They have different primary key, OIDs, and so on. This has happened several times in the last days. If I issue the SQL command "Delete ......" no errors occurs. Please I need help, because the database is into production, and I am receiving callings from angry users which can not delete rows from their Visual Basic program ( they access the PostgreSQL database via this program, and get the message " the record does not exist" when they are trying to delete). Thanks in advance, and sorry for my poor english. Indibil ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org