Is there any relevant reason to restrict "append" for not using in a loop? (I need it in a "foreach ..." loop). and, do we have a command to pause the execution of a gretl script? (as "sleep" or "wait" in other languages) -- Ignacio Díaz-Emparanza Dpto. de Economía Aplicada III (Econometría y Estadística) UPV-EHU