Problems running Release 1.0.1 of openEHR Java Reference Implementation

Hi to all from Trinity College Dublin,

I'm a student in the university and I'm starting to work on OpenEHR,
so please forgive me if my question(s) is/are newbie ones, or if
I've asked it in the wrong place, please redirect me.

I did check the mailing list archive and could find no discussion
about this problem.

I downloaded the file openehr_ref_impl_java-1.0.1.jar

from

http://www.openehr.org/wiki/display/projects/Java+Project+Download

However, when I tried to run it, I got this

It is a library, you should write your own software to run it. There
should to be Junit-tests in the repository, you can look at them for
examples how to use the library

good luck
Bert