On Mon, 29 Oct 2018, David G. Johnston wrote:
You seem to need to distinguish between the command line options to psql and the meta commands that can be used within a script that is being executed by psql.
David, I'm running psql in a shell buffer within emacs, not at the shell prompt. The entire script is: \o data-summary-by-form.txt select param, site_nbr, sampdate, min(quant), max(quant), unit from concentrations group by param, site_nbr, sampdate, unit order by param, site_nbr, sampdate, unit; \o This generates the error. Other backslash commands, such as \d <tablename> work, but both \o and \g produce the error when followed by the select command. Rich