Subversion Repositories SoapBoxCore

Error running this command: svn --non-interactive --config-dir /tmp log --xml --quiet --username '***' --password '***' -r HEAD:1 'http://svn.soapboxcore.com/svn/trunk/NLog/src/NLog/NLog.xml@18' --limit 2
svn: '/svn/!svn/bc/22/trunk/NLog/src/NLog/NLog.xml' path not found