• using R version 3.0.1 Patched (2013-05-18 r62762)
• using platform: sparc-sun-solaris2.10 (32-bit)
• using session charset: UTF-8
• checking for file ‘gcExplorer/DESCRIPTION’ ... OK
• this is package ‘gcExplorer’ version ‘0.9-4’
• checking package namespace information ... OK
• checking package dependencies ... ERROR
  Package required but not available: ‘Rgraphviz’
  
  See the information on DESCRIPTION files in the chapter ‘Creating R
  packages’ of the ‘Writing R Extensions’ manual.