enforce-variants gtk2 +universal - @MacPorts version 2.03 - error

[adam.clay@…]

I am trying to install a free program called Scala that requires installation of MacPorts, and the ports "fontconfig" and "gtk2". These two seemed to install correctly from the terminal with the following commands:

sudo port install fontconfig sudo port install gtk2

which tells me (if I understand the way MacPorts works) I installed both Macports, and these specific ports correctly.

The instructions then ask me to modify my ".profile" file adding this line:

export PATH=/opt/local/bin:/opt/local/sbin:$PATH

which I did, and then install the libpng 1.4.5 or Combo Installer, which I did.

Then, because I have a 64 bit Imac, I was asked to use the following terminal command:

sudo port upgrade --enforce-variants gtk2 +universal,

and when doing this I got the following error messsage:

Error: Target org.macports.build returned: shell command failed (see log for details) Log for p5.12-xml-parser is at: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_perl_p5-xml-parser/p5.12-xml-parser/main.log Error: Unable to upgrade port: 1

Could anyone help me figure out why I cannot do this?