OW2 Consortium dream

Error running this command: /usr/bin/svn --non-interactive --config-dir /var/www/websvn232/tmp log --xml --quiet -r 576:1 'file:////svnroot/dream/tags/dreamcore-0_2/dreamlib@576' --limit 40
svn: File not found: revision 576, path '/tags/dreamcore-0_2/dreamlib'