[R] Error: file association for 'doc\html\index.html' not available or invalid

[Prof Brian Ripley]

On Fri, 7 Mar 2008, Jon Olav Vik wrote:

> Today HTML help stopped working. The menu command "Help > Html help" usually
> brings up my default web browser (Opera 9.26), but now R gives the error
> Error: file association for 'doc\html\index.html' not available or invalid
> If I try the same menu command a second time, R crashes with the message
>
> The instruction at "0x7c9106c3" referenced memory at "0x7c9f4302". The memory
> could not be "written".
>
> The same problem occurs when calling help from the command line, e.g. with
> ?license
>
> I'm running R 2.6.2 on Windows XP SP2. Googling for the error turns up nothing,
> and I have no idea where to look for further diagnosis. I have uninstalled,
> deleted the R package directories, and checked the registry for metions of
> "\R\", but the problem remains. I can't think of any unusual changes I made
> before this problem arose.

Try re-setting the file association for .html files -- it looks as if it 
has been corrupted (not by R).

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595