Actually, the 'devnull' import shouldn't be a problem as it was fixed in response to Horst Schirra's bug report #6403 (https://gna.org/bugs/?func=detailitem&item_id=6403). This lead to the release of version 1.2.6 of relax (https://gna.org/forum/forum.php?forum_id=1254 and https://mail.gna.org/public/relax-announce/2006-07/msg00002.html). Hopefully, fingers crossed, relax should now run perfectly under MS Windows.
Edward