Hi, i'm trying to install the packages rgdal and spgrass6 by "install.packages" but i receive always this message: ERROR: configuration failed for package 'rgdal' ** Removing '/home/thyberio/R/i486-pc-linux-gnu-library/2.7/rgdal' ** Restoring previous '/home/thyberio/R/i486-pc-linux-gnu-library/2.7/rgdal' The downloaded packages are in /tmp/RtmpZ4mU6z/downloaded_packages Warning message: In install.packages("rgdal") : installation of package 'rgdal' had non-zero exit status Then, i tried download the packages from www.r-project.org and extract them in the directory /usr/lib/R/library/, but the program don't read the packages and return the follow message: 'rgdal' não é um pacote válido -- instalado antes do R 2.0.0? or 'rgdal' is no a valid package -- installed before R 2.0.0? anyone can help me? versions: R 2.8.0 GRASS 6.3 Ubuntu Hardy 8.04 Thanks, Thybério - Brazil [[alternative HTML version deleted]]