[SL] Upgrade to current SL in big jump

[<wj...@pa...>]

I am attempting to upgrade 2.6.1 database(PG 7.3) to version 2.8.24(with
PG 8.3).

Created new empty dataset "db_new_2.8.24",
Fixed SETVAL etc as per FAQ in old database "db_old_2.6_1"
then restore with psql db_new_2.8.24.sql < db_old_2.6_1.sql

BUT getting scores of errors "relation xyz etc does not exist".

I also tried fixing all the tables by putting "WITH OIDS" in
db_old_2.6_1.sql but that does not work either (the inserts now appeared
to work but getting same errors at the end - maybe INDEXES may be an
issue)

Any suggestions anyone?
Thanks and regards