PostgreSQL upgrade (7.3->7.4) failed: need a up to date dump

[Cinly Ooi <co224@cam.ac.uk>]

Dear all,

While trying to upgrade from 7.3->7.4, I cannot get around the problem of
"You must have an up to date dump before upgrading to PostgreSQL 7.4"
eventhough I tried pg_dumpall > dumpfile

What I did is as below:

<msg>
root# postgre dpkg -i postgresql_7.4.1-3_i386.deb
(Reading database ... 60873 files and directories currently installed.)
Preparing to replace postgresql 7.3.4-9 (using 
postgresql_7.4.1-3_i386.deb) ...
Stopping PostgreSQL database: postmaster
waiting for postmaster to shut down......done
postmaster successfully shut down
.
You must have an up to date dump before upgrading to PostgreSQL 7.4
dpkg: error processing postgresql_7.4.1-3_i386.deb (--install):
subprocess pre-installation script returned error exit status 1
Nothing to do for abort-upgrade
Errors were encountered while processing:
postgresql_7.4.1-3_i386.deb

</msg>

Please help. Thanking you in advance

Best regards,
Cinly Ooi