Subversion Repositories shark

Error running this command: /usr/local/bin/svn --non-interactive --config-dir /tmp list --xml -r 162 'file:///home/shark/svn/shark/trunk/drivers/svga@861'
warning: W160013: File not found: revision 861, path '/shark/trunk/drivers/svga'<br />
E200009: Could not list all targets because some targets don't exist