eclipse overview/help file problem

[Vizion]

Hi

Does anyone know what files comprise the help system and how the help  files 
are accessed by eclipse. I am wondering whether there is an ownership issue 
or I have some files missing.

When,  on the overview page, I try to follow the links for:
Workbench basics, team support, Java development or Eclipse plug-in 
development
I get this response:  
"The document that you have requested is not available. The link may be wrong, 
or you may not have the corresponding product feature installed"

The tutorials, Samples What's New and workbench all function correctly.
Help>Help Content -  produces the same error message

The ownership of  my eclipse directory  tree is by user dev group wheel.
can anyone point the way please?

David  
-- 
40 yrs navigating and computing in blue waters.
English Owner & Captain of British Registered 60' bluewater Ketch S/V Taurus.
 Currently in San Diego, CA. Sailing May/June bound for Europe via Panama 
Canal.