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. Any help would be appreciated. Best regards, Jon Olav Vik
Error: file association for 'doc\html\index.html' not available or invalid
3 messages · Brian Ripley, Jon Olav Vik
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
On 3/7/08, Prof Brian Ripley <ripley at stats.ox.ac.uk> 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
[...]
Try re-setting the file association for .html files -- it looks as if it has been corrupted (not by R).
Blimey. It worked. I'm sorry I didn't mention it in my first post, but *.html files did open with Opera even while R would crash. However, following your suggestion, I looked at the Properties for an html file, and it said "Opens with: unknown application". (Strangely enough, the file icon was still Opera's "O".) So I re-selected Opera as the default application, and everything went back to normal. Thank you so much for your help! Jon Olav