On Mon, 7 Sep 2020, Luke Hartigan wrote: i586 basically means "Pentium" and implies 32-bit -- those builds ar quite dated by now. I have now put 64-bit Linux versions of X-13-ARIMA-SEATS and TRAMO/SEATS in the x13as and tramo directories under https://sourceforge.net/projects/gretl/files/ They're tested on Fedora 31 and should, I believe, work on Fedora 32. Here's a quick install guide. If this works for you I'll update the info on the gretl website: === start guide === To install x13as-linux-64.tar.gz or tramo-seats-linux-64.tar.gz for recent 64-bit Linux with libgfortran.so.5. Download the file you want from https://sourceforge.net/projects/gretl/files/x13as or https://sourceforge.net/projects/gretl/files/tramo Keep track of the download location! Then in a terminal window: cd / sudo tar xvf <download-location>/x13as-linux-64.tar.gz # or sudo tar xvf <download-location>/tramo-seats-linux-64.tar.gz This will unpack the selected program into /opt/x13as or /opt/tramo. Then in gretl go to /Tools/Preferences/General and select the "Programs" tab. For x13as, set "Path to x12arima" to /opt/x13as/bin/x13as For tramo-seats, set "Path to tramo" to /opt/tramo/bin/tramo And that should be all. === end guide === Allin Cottrell