[R] Cannot update 2.8.1 packages: unable to access index forrepository...

Charles Annis, P.E. Charles.Annis at StatisticalEngineering.com
Mon Mar 9 19:10:18 CET 2009

Are you using Microsoft OneCare?  I had a similar problem accessing CRAN
(actually setting a CRAN mirror) several weeks ago with R2.8.1 while R2.6.2
could access CRAN with no difficulties.  Even running R as Administrator
wouldn't work.

The problem proved to be that OneCare had asked for my permission to let
R2.8.1 access the internet, but I missed the request (the window was buried
elsewhere).  Several days later the request again surfaced, I OKed the
internet access and all the problems vanished.

Charles Annis, P.E.

Charles.Annis at StatisticalEngineering.com
phone: 561-352-9699
eFax:  614-455-3265

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On
Behalf Of Marcus, Jeffrey
Sent: Monday, March 09, 2009 1:07 PM
To: r-help at r-project.org
Subject: [R] Cannot update 2.8.1 packages: unable to access index

I am having trouble updating packages for R 2.8.1 in Windows XP. Note that I
*am* able to update packages for R 2.7.0  (see bottom of posting) so this is
not an Internet proxy problem. The steps I took were to 

(a) Copy over packages from my existing (2.7.0) library subdiretory to the R
2.8.1 library subdirectory. This included  a long list of packages including
RODBC, rpart,  RGraphViz, ggplot2 and their dependents. 
(b) From within Rgui, run  update.packages(ask='graphics')

I tried this several times with different repositories and mirrors and each
time got messages like:

Warning: unable to access index for repository
Warning: unable to access index for repository
Warning: unable to access index for repository
Warning: unable to access index for repository

Finally, I noticed that a recent R-help thread

Includes the following comment (excerpted) from Professor Brian Ripley

     a) There seem to be no Windows binaries on Omegahat for R > 2.7. 

     b) A few are available from CRAN extras (one of the default 
         repositories on Window), and I've added Rstem.  So please try again


Does this mean that I should update 2.8.0 libraries from zip files manually?
Or is there a more convenient workaround for updating? 

By the way, here is what I see with R 2.7.0

> update.packages(ask='graphics')
trying URL
Content type 'application/zip' length 195082 bytes (190 Kb)
opened URL
downloaded 190 Kb

package 'RODBC' successfully unpacked and MD5 sums checked
Warning: cannot remove prior installation of package 'RODBC'

The downloaded packages are in
        C:\Documents and Settings\jmarcus\Local
updating HTML package descriptions

Thanks for any help
Manager, Applied Data Analysis

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