We recently noticed that there was a problem with the optional package
that supplies tramo/seats for use with gretl on Linux. (These programs
do ARMA estimation and seasonal adjustment.) The seats executable was
failing, meaning that seasonal adjustment was not completed.
That problem is now fixed in a new release of tramo-seats-linux-64.tar.gz at
https://sourceforge.net/projects/gretl/files/tramo/
See also
https://gretl.sourceforge.net/x13a_and_tramo_linux.html for
installation info.
Allin Cottrell