Subversion Repositories shark

Error running this command: /usr/local/bin/svn --non-interactive --config-dir /tmp list --xml -r 1181 'file:///home/shark/svn/demos/trunk/fsf@1557'
warning: W160013: File not found: revision 1557, path '/demos/trunk/fsf'<br />
E200009: Could not list all targets because some targets don't exist