r - Rscript "there is no package" -

i have script loads data, processes it, , saves processed data out. run manually without problem, not work rscript. uses data.table package, , rscript cannot find it. have tried the solution here following error message:

error in eval(expr, envir, enclos) :   not find function ".getnamespace"  in addition: warning message: package ‘data.table’ built under r version 3.1.1 error : unable load r code in package ‘chron’  error: package/namespace load failed ‘data.table’ execution halted 

the script looks like:

#!/usr/local/bin/rscript args = commandargs(trailingonly = true)  # take arguments command line library.path <- '/home/zack/r/x86_64-redhat-linux-gnu-library/3.1' library('data.table', lib.loc = library.path) 

that code after failing library(data.table). can load data.table fine, , rest of script works, if manually. command submit bash is:

nohup /usr/local/bin/rscript --vanilla <path script> <args> & 

session info:

> sessioninfo() r version 3.1.1 (2014-07-10) platform: x86_64-redhat-linux-gnu (64-bit)  locale:  [1] lc_ctype=en_us.utf-8       lc_numeric=c                [3] lc_time=en_us.utf-8        lc_collate=en_us.utf-8      [5] lc_monetary=en_us.utf-8    lc_messages=en_us.utf-8     [7] lc_paper=en_us.utf-8       lc_name=c                   [9] lc_address=c               lc_telephone=c             [11] lc_measurement=en_us.utf-8 lc_identification=c         attached base packages: [1] stats     graphics  grdevices utils     datasets  methods   base  

which rscript:

/usr/local/bin/rscript 

/usr/local/bin/r loads data.table fine when called in interactive session.