OW2 Consortium contrail

Error running this command: /usr/bin/svn --non-interactive --config-dir /var/www/websvn232/tmp log --xml --verbose -r 520:1 'file:////svnroot/contrail/trunk/conpaas/conpaas-web/src@520' --limit 2
svn: File not found: revision 520, path '/trunk/conpaas/conpaas-web/src'