"Nykolyn, Andrew P (AS)" <andrew(dot)nykolyn(at)ngc(dot)com> writes:
> I have successfully installed 8.3.5 as a fresh install on a Redhat 4.5
> machine. Now I try to upgrade another Redhat 4.5 machine with an
> existing 8.2.4 install and the "make check" fails all tests. When I
> look at the results file for each type being tested I see the same error
> indicating that there is an undefined symbol:
> pg_valid_server_encoding_id and the test does not get run. Any ideas on
> what I might be missing or have to change? Thanks much.
Sounds like you are trying to use an 8.3 client program with an 8.2
version of libpq.so.
regards, tom lane