In the function GRANonGRAN() the following lines fail:
res = file.copy(system.file("GRAN", package="GRANBase"),
normalizePath2(repobase(repo)), recursive=TRUE,
overwrite=TRUE)
if(any(!res))
stop("copy failed")
The reason is that the file "GRAN" doesn't seem to exist in GRANbase
system.file("GRAN", package="GRANBase")
[1] ""
Should this line refer to a different folder?