problem with library()

Hello, I am running Win XP in a notebook IEEE, I have R-2-15.0 and R-2.15.1. In a subdirectory Cran I
have the packages I downloaded from CRAN (all), after last update when I type
library()
Error in .readRDS(pfile) : unknown input format

a very old R-2.4.0 sitting in a corner and not used for a long time with a very reduced Cran subdirectory, OK at the time, library() works OK. So I assume, without any knowledge, that the problem may be that the list of packages has somehow overstep a limit in Win XP, or in the limited RAM of the notebook (1 G total).
Can somebody shed any light?
Thanks

R.Heberto Ghezzo Ph.D.
Montreal - Canada
Hello, I am running Win XP in a notebook IEEE, I have R-2-15.0 and R-2.15.1. In a subdirectory Cran I
have the packages I downloaded from CRAN (all), after last update when I type
library()
Error in .readRDS(pfile) : unknown input format
Hmmm, this is not a clean R-2.15.1: .readRDS is defunct nowadays.

Hence I assume you got packages or even whole libraries and R versions 
mixed up on your machine.

Best,
Uwe Ligges

a very old R-2.4.0 sitting in a corner and not used for a long time with a very reduced Cran subdirectory, OK at the time, library() works OK. So I assume, without any knowledge, that the problem may be that the list of packages has somehow overstep a limit in Win XP, or in the limited RAM of the notebook (1 G total).
Can somebody shed any light?
Thanks

R.Heberto Ghezzo Ph.D.
Montreal - Canada
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