* using log directory 'd:/Rcompile/CRANpkg/local/2.5/relations.Rcheck'
* using R version 2.5.1 Patched (2007-08-01 r42387)
* checking for file 'relations/DESCRIPTION' ... OK
* this is package 'relations' version '0.3-0'
* checking package dependencies ... ERROR
Packages required but not available:
  sets

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