QGIS » QGIS Application

I am trying to run one of the example R scripts that comes with the default installation of QGIS 1.8. I have set-up the SEXTANTE options to point to the folder where R-3.0.2 is installed on my PC. After running the script (as an example the one to "Create Random sampling grid") the tool correctly build up the execution commands to be passed to R (see below) but nothing is generated and I receive a generic error message "Could not load layer: E:/XXX/test1.shp, Check the SEXTANTE log to look for errors". I have checked and the "rgdal" package is correctly installed in R and the commands are correctly executed in R. Glad for any advice you might give. Fabio

Algorithm Create random sampling grid starting...
R execution commands
options("repos"="http://cran.us.r-project.org")
tryCatch(find.package("rgdal"), error=function(e) install.packages("rgdal", lib="C:/Documents and Settings/<my name>/.qgis//sextante/rlibs"))
library("rgdal")
polyg = readOGR("E:/XXX",layer="Barrier")
numpoints=10
pts=spsample(polyg,numpoints,type="random")
output=SpatialPointsDataFrame(pts, as.data.frame(pts))
writeOGR(output,"E:/XXX/test1.shp","test1", driver="ESRI Shapefile")
R execution console output
Converting outputs
Loading resulting layers
Algorithm Create random sampling grid finished