Hi, Is it possible that there is something wrong or missing in handling the result from a SET command ? POSTMODERN 44 > (connect-toplevel "test" "postgres" "" "localhost") POSTMODERN 45 > (execute "set time zone gmt") CL-POSTGRES: set time zone gmt Error: Postgresql protocol error: Unexpected message received: S 1 (abort) Return to level 0. 2 Return to top loop level 0. Type :b for backtrace, :c <option number> to proceed, or :? for other options POSTMODERN 46 : 1 > :b Call to CL-POSTGRES::LOOK-FOR-ROW Call to CL-POSTGRES::SEND-QUERY Call to (HARLEQUIN-COMMON-LISP:SUBFUNCTION (LABELS #:G135637) EXEC- QUERY) Call to EXEC-QUERY Call to EVAL Call to CAPI::CAPI-TOP-LEVEL-FUNCTION Call to CAPI::INTERACTIVE-PANE-TOP-LOOP Call to (HARLEQUIN-COMMON-LISP:SUBFUNCTION MP::PROCESS-SG-FUNCTION MP::INITIALIZE-PROCESS-STACK) Thanks, Sven