Niko Ware <nikowareinc@xxxxxxxxx> writes: > I modified the code to include the "extra" member in the following > statement: > fprintf(stderr, > "ASYNC NOTIFY of '%s' received from backend PID %d: %s\n", > notify->relname, notify->be_pid, *notify->extra*); > Both the example and my application core on an invalid address for "extra". Modifying testlibpq2.c like that works for me, FWIW. I speculate maybe you have a macro definition of "extra" that is bollixing things somehow? Kind of a weak theory, but nothing else comes to mind. regards, tom lane