I tried to do your suggestion but it does not work, in the variable menu in Gretl the mentioned 2 programms are visible in light grey but they are not openable when you click on them. ----Messaggio originale---- Da: cottrell(a)wfu.edu Data: 03/04/2009 16.36 A: "deriv@libero.it"<deriv@libero.it>, "Gretl list&quot;&lt;gretl-users(a)lists.wfu. edu> Ogg: Re: [Gretl-users] Gretl and X-12-ARIMA and TRAMO/SEATS On Sat, 21 Feb 2009, deriv(a)libero.it wrote: in Running the self-installers should be sufficient (then re-start gretl after doing so). Do you have a seasonal time series dataset loaded? Try, for example, the supplied Ramanathan data file data9-7. Allin Cottrell