Subversion Repositories eFlore/Archives.cel-v2

Error running this command: svn --non-interactive --config-dir /tmp/websvn log --xml --quiet --limit 40 -r -1:1 'file:///home/svn/depot/eflore/archives/cel-v2/trunk/www/org.tela_botanica.cel2/53DD49C9D0A7864C99141C24E4DEC5A2.cache.xml@-1'
No output on STDOUT.E205000: Syntax error in revision argument '-1:1'