Oops. This means major rewrite of my backup procedure. Thanks for pointing this out. I will likely just switch to pg_basebackup. What I have is something old and gnarly from the days of psql version 8. ________________________________________ From: David G. Johnston <david.g.johnston@xxxxxxxxx> Sent: Tuesday, May 21, 2024 6:42 PM To: Dmitry O Litvintsev Cc: pgsql-generallists.postgresql.org Subject: Re: Confusing error message in 15.6 [EXTERNAL] – This message is from an external sender On Tue, May 21, 2024, 17:29 Dmitry O Litvintsev <litvinse@xxxxxxxx<mailto:litvinse@xxxxxxxx>> wrote: Hi, I am observing the following error which confuses me: # psql -U postgres template1 -c "checkpoint; select pg_backup_start('${dest}.tar.Z', true)" CHECKPOINT pg_backup_start ----------------- 17BF7/3009498 (1 row) # psql -U postgres template1 -c "select pg_backup_stop(true)" ERROR: backup is not in progress HINT: Did you call pg_backup_start()? This is postgresql 15.6 running on RH 7. This is not just amusing, it is breaking my backup script after update from 11 to 15 (and change from pg_{start,stop}_backup to pg_backup_{start_stop}) Yep, nowadays you must keep the transaction where you issued backup start open until you issue backup end. Using -c isn't going to cut it. David J.