Apologies.  A few weeks ago I send a posting to this
group looking for a  GUI in which to implement a matching
algorithm on graphs.

        Someone responded (from a university in Germany I think)
and mentioned a tool  (Dr. Graph I think)  that sounded like it
would meet my needs.  It ran under  Tower Eiffel.
Unfortunately my copy of the email
was accidentally erased.  

        Could the person who answered my posting send me another
email about  Dr. Graph.    If anyone else is familiar with this
tool perhaps you could send me email.

        Thanks and apologies again.

        Ralph Boland