MacPorts error

I just received my first mac yesterday. One of the things I did today was to install macports. But the thing is, I keep getting an error when trying to install applications. For example if I try to install gimp:

sudo port install gimp

I get this error:

Error: Unable to execute port: invalid command name "configure.universal_args"

I already have x11 installed, so I don't think that is the problem.

 

Bump.