I'd follow Friedrich's advice below and see how that goes.
sudo port uninstall installed
maybe several times. Then
sudo port install pspp
to recover from any misconfigured or incomplete
packages. Then test
pspp --version
This should look like this
pool8021x172-7:~
fritz$ pspp --version
pspp
(GNU PSPP) 0.10.1-geba86b
Packaged
by snc (0.10.1-20160328030502)
Copyright
(C) 2014 Free Software Foundation, Inc.
This
is free software: you are free to change and redistribute
it.
There
is NO WARRANTY, to the extent permitted by law.
Written
by Ben Pfaff, John Darrington, and Jason Stover.
pool8021x172-7:~
fritz$
You should be able to start pspp with gui from the
terminal with
psppire
To see if you have any previous version installed
somewhere, you could try
which pspp
pool8021x172-7:~
fritz$ which pspp
/opt/local/bin/pspp
pool8021x172-7:~
fritz$
This shows you that pspp is installed in
/opt/local/bin where it is supposed to be. pspp will not be
visible in the
„Program“ folder where programs are usually
installed. So you have to start pspp from the terminal.
Friedrich