Hi all, I know of 2 causes: - hit CTRL-C in the psql client; - have a non-zero statement timeout and have the statement actually time out; But I am seeing this via JDBC which can't cancel a statement AFAIK, and the statement_timeout is set to 0 (in the config file globally, and there's no override for the users, nor in our JDBC code). I wonder if there is any other scenario which can trigger this error ? I found a lot of them in our logs, last night we had hundreds of them, but now that I looked it happened sporadically in the past too... Could some network problem trigger this ? TIA, Csaba.