How to export via svnkit-cli

Is there some problem with export? I've been trying something like:
jsvn export https://appframework.dev.java.net/svn/appframework/trunk/www/images/

On Windows XP with 1.1.7.4 (and 1.1.3) and nothing happens. If I swap out 'export' for 'co' I have more success, but I'm trying to checkout resources from our internal svn during ant build of distributions. Was trying to avoid having to recursively delete all the .svn related working files & folders?

Don't get any errors and also couldn't find the cli documented anywhere?