Hi, the following minimal demonstration script: <script> open denmark loop i=1985:1..1985:4 printf "the period: %s\n", obslabel(i) end loop </script> yields the following output for me: <output> gretl-Version 1.8.6cvs Aktuelle Sitzung: 2009-12-09 19:00 ? open denmark Lese Datendatei /usr/local/share/gretl/data/misc/denmark.gdt Periodizität: 4, max-Beob.: 55, Beobachtungsbereich: 1974:1-1987:3 Liste 5 Variablen auf: 0) const 1) LRM 2) LRY 3) IBO 4) IDE ? loop i=1985:1..1985:4 loop: i = 1985:2 the period: 1985:1 loop: i = 1985:3 the period: 1985:2 loop: i = 1985:4 the period: 1985:3 loop: i = 1986:1 the period: 1985:4 Anzahl an Iterationen: 4 </output> Notice that gretl's echo/message w.r.t. the loop index seems to be ahead of the actual loop index by one. But the bug seems harmless, as nothing substantial is affected. Or am I missing something? thanks, sven