Subversion Repositories WebE

Error running this command: svn --non-interactive --config-dir /tmp log --xml --verbose -r 28:1 'file:////home/mw3020/f001/svn/FFHS/WebE/trunk/WebContent/WEB-INF/classes/log4j.properties@28' --limit 2
svn: E160013: File not found: revision 28, path '/trunk/WebContent/WEB-INF/classes/log4j.properties'