"David Rovner" <DRovner@princetonservergroup.com> writes:
> I see this error at the command prompt in root executing anything that
> starts with "psql". The argument list does not matter. "psql" with no
> arguments returns this error as well.
PGOPTIONS environment variable, perhaps? It's hard to imagine why
anyone would try to set listen_addresses that way, but ...
$ PGOPTIONS='--listen_addresses=*' psql
psql: FATAL: parameter "listen_addresses" cannot be changed after server start
$
regards, tom lane