Subversion Repositories eFlore/Applications.cel

Error running this command: svn --non-interactive --config-dir /tmp/websvn log --xml --quiet --limit 40 -r -1:1 'file:///home/svn/depot/eflore/applications/cel/trunk/cel2.launch@-1'
No output on STDOUT.E205000: Syntax error in revision argument '-1:1'