"Josh Harrison" <joshques(at)gmail(dot)com> writes:
>> What version of Slony? same for both servers?
> Yes slony version 1.2.12
Judging from the error message, you can't do that --- you need at least
different versions of the .so file for 7.4 and 8.1.
(GetTopTransactionId did not exist in 7.4.) But this is the wrong place
to be asking about that; the slony lists would have people who know
more.
regards, tom lane