No idea, do you have the right repository seledcted? Is there nay proxy in your network that may change the download data for some reason? I have not observed that before and I haven't seen similar reports before.

Best,
Uwe Ligges

On 21.06.2010 11:03, Rubén Roa wrote:

Dear ComRades,

I am having the "wrong MD5 checksums" error with every package I try to install.
It happened with R 2.11.0, then I updated to R 2.11.1, same thing.

sessionInfo()
R version 2.11.1 (2010-05-31)
i386-pc-mingw32

locale:
[1] LC_COLLATE=Spanish_Spain.1252  LC_CTYPE=Spanish_Spain.1252    
LC_MONETARY=Spanish_Spain.1252
[4] LC_NUMERIC=C                   LC_TIME=Spanish_Spain.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

loaded via a namespace (and not attached):
[1] tools_2.11.1

I triend changing the mirror, to no avail. Then I tried downloading zip files and 
installing from local zips but again I got the "wrong MD5 checksums" error

utils:::menuInstallLocal()
files R/MASS.rdb, data/Rdata.rdb, help/MASS.rdb have the wrong MD5 checksums

In some cases, another error message pointed to a namespace problem, for 
example:

library(Formula)
Error in get(Info[i, 1], envir = env) :
   internal error -3 in R_decompress1
Error: package/namespace load failed for 'Formula'

Any hints?

____________________________________________________________________________________

Dr. Rubén Roa-Ureta
AZTI - Tecnalia / Marine Research Unit
Txatxarramendi Ugartea z/g
48395 Sukarrieta (Bizkaia)
SPAIN

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