On Mon, 22 Oct 2007, andreas.rosenblad(a)ltv.se wrote: The fix was very easy, and I just put it into CVS: Index: gui2/library.c =================================================================== RCS file: /cvsroot/gretl/gretl/gui2/library.c,v retrieving revision 1.849 diff -u -w -u -r1.849 library.c --- gui2/library.c 21 Oct 2007 15:11:07 -0000 1.849 +++ gui2/library.c 22 Oct 2007 09:35:59 -0000 @@ -5566,7 +5566,7 @@ v = select_var_from_list_with_opt(list, "Select sort key", opts, DATASORT); - if (v > 1) { + if (v > 0) { err = dataset_sort_by(v, Z, datainfo, opt); if (err) { gui_errmsg(err); Riccardo (Jack) Lucchetti Dipartimento di Economia Università Politecnica delle Marche r.lucchetti(a)univpm.it http://www.econ.univpm.it/lucchetti