Subversion Repositories shark

Error running this command: /usr/local/bin/svn --non-interactive --config-dir /tmp list --xml -r 1420 'file:///home/shark/svn/demos/trunk/rtw@1522'
warning: W160013: File not found: revision 1522, path '/demos/trunk/rtw'<br />
E200009: Could not list all targets because some targets don't exist