[R] Problem with R CMD BATCH on R-2.5.0 due to Sys.unsetenv not available

[Simon Penel]

Hello,

I am working on an unix SunOS machine ( sun4u sparc) and since the last 
release  of R  -R version 2.5.0 (2007-04-23) - ,
I have got troubles during the execution of batch command.


For example with the instruction file multic.in
 >cat  multic.in
install.packages("multic","/bge/penel/R_install/R_2.5.0/lib/R/library",repos="http://cran.at.r-project.org")


When  I use the BATCH command, I get an error :

 >R_2.5.0/bin/R  CMD BATCH multic.in

creates the multic.in.Rout file :

 >cat multic.in.Rout
Error in Sys.unsetenv("R_BATCH") : 'Sys.unsetenv' is not available on 
this system
Execution halted


Effectiveley,  Sys.unsetenv is not available on unix
When running R :
 >  Sys.unsetenv("toto")
Error in Sys.unsetenv("toto") : 'Sys.unsetenv' is not available on this 
system


Does that mean that it is not possible anymore to use R CMD BATCH on 
unix OS ?
This is very recent, since it was working fine with the R-patched 
version :R version 2.5.0 Under development (unstable) (2007-03-18 r40854)


Thanks for your help

Simon


-- 
Simon Penel
Laboratoire de Biometrie et Biologie Evolutive           
Bat 711  -   CNRS UMR 5558  -    Universite Lyon 1              
43 bd du 11 novembre 1918 69622 Villeurbanne Cedex       
Tel:   04 72 43 29 04      Fax:  04 72 43 13 88
http://pbil.univ-lyon1.fr/members/penel