* using log directory 'd:/Rcompile/CRANpkg/local/2.10/UScensus2000.Rcheck'
* using R version 2.10.1 (2009-12-14)
* using session charset: ISO8859-1
* checking for file 'UScensus2000/DESCRIPTION' ... OK
* checking extension type ... Package
* this is package 'UScensus2000' version '0.09'
* checking package dependencies ... ERROR
Packages required but not available:
  sp

See the information on DESCRIPTION files in the chapter 'Creating R
packages' of the 'Writing R Extensions' manual.