The 8.x version of PostgreSQL has been installed on my PC for quite few years. It has been problem free until recently. The first problem I have is that a connection can't be established after the PC just starts up although the DB is started. I have to restart it to solve this problem each time after my PC is up. The other problem, I just find this morning, is that table ID generation. A table ID is defined as the following: id SERIAL UNIQUE primary key, When I save a new entry to this table, I get an error as org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save() from Hibernate. No all table demonstrate this error. Shall I reinstall PostgreSQL for resolve those two problem? Thanks, - v -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general