port openmotif returned: xorg-libXt must be installed with +flat_namespace

[sheltonwajr@…]

I received the following error when trying to install opendx. This also happens when installing grace (no surprise).

sudo port install opendx
--->  Computing dependencies for opendx
--->  Dependencies to be installed: openmotif
--->  Fetching archive for openmotif
Error: org.macports.archivefetch for port openmotif returned: xorg-libXt must be installed with +flat_namespace.
Error: Failed to install openmotif
Please see the log file for port openmotif for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_x11_openmotif/openmotif/main.log
Error: The following dependencies were not installed: openmotif
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets
Error: Processing of port opendx failed

[ryandesign (Ryan Carsten Schmidt)]

That is correct. This is not a bug. You must install xorg-libXt with the +flat_namespace variant by running:

sudo port upgrade --enforce-variants xorg-libXt +flat_namespace