Dear List
I'm  trying to install a package not present in cran named A2R (
http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=79)
After running the demo script  I retrieve the following error:
cannot change value of locked binding for '._a2r_counter'

Please could someone  give to me a tip about my error?
Thank you very much
Here is my sessionInfo()

R version 2.15.0 (2012-03-30)
Platform: x86_64-pc-linux-gnu (64-bit)

locale:
 [1] LC_CTYPE=it_IT.UTF-8       LC_NUMERIC=C
 [3] LC_TIME=it_IT.UTF-8        LC_COLLATE=it_IT.UTF-8
 [5] LC_MONETARY=it_IT.UTF-8    LC_MESSAGES=it_IT.UTF-8
 [7] LC_PAPER=C                 LC_NAME=C
 [9] LC_ADDRESS=C               LC_TELEPHONE=C
[11] LC_MEASUREMENT=it_IT.UTF-8 LC_IDENTIFICATION=C

attached base packages:
 [1] splines   stats4    grid      stats     graphics  grDevices utils
 [8] datasets  methods   base

other attached packages:
 [1] fpc_2.0-3         flexmix_2.3-8     multcomp_1.2-12   survival_2.36-14
 [5] mvtnorm_0.9-9992  modeltools_0.2-19 lattice_0.20-6    mclust_3.5
 [9] cluster_1.14.2    MASS_7.3-19       A2R_0.0-4

loaded via a namespace (and not attached):
[1] tcltk_2.15.0 tools_2.15.0

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