--2013-09-30 16:07:43--  http://cran.r-project.org/src/contrib/bitops_1.0-5.tar.gz
Resolving cran.r-project.org... 137.208.57.37
Connecting to cran.r-project.org|137.208.57.37|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2013-09-30 16:07:44 ERROR 404: Not Found.