I just installed bioconductor via getBioC.R but there is 3 problems: apparently some libraries are missing and I don't know which one, and even the XML package add a error message like : 1:Installation of package Rgraphviz had non-zero exit status in: installPkg(fileName, pkg, pkgVer, type, lib, repEntry, versForce) 2:Installation of package rhdf5 had non-zero exit status in: installPkg(fileName, pkg, pkgVer, type, lib, repEntry, versForce) 3:Installation of package XML had non-zero exit status in: installPkg(fileName, pkg, pkgVer, type, lib, repEntry, versForce) What can I do? Thanks in advance! Line