help.topic.4.title = OpenVPMS How To
help.topic.4.url = http://www.openvpms.org/documentation/csh/1.9/how-to
(and similar for 2.0)
The actual url should be http://www.openvpms.org/documentation/csh/1.9/how
In fact 1.9 works (from my laptop), but with 2.0 running on Amazon it gets a page not found error.
I do not understand why 1.9 work but 2.0 does not. Safest would be to change 'how-to' to 'how'