Hi, I am having some problems on installing bioconductor packages. I got 7 warnings and those 7 packages were not compiled correctly. I installed Graphviz by using RPM, but not sure about HDF (I downloaded it and did what doc says I should do but rhdf5 could not find it). I am running R 1.7.1 on RH linux 7.2. Could anybody give me some idea? Thank you very much. wz Packages Rgraphviz and rhdf5 require special libraries to be installed. Please see the URL http://www.bioconductor.org/faq.html#Other Notes for more details on installing these packages if they fail to install properly Warning messages: 1: Installation of package Rgraphviz had non-zero exit status in: installPkg(fileName, pkg, pkgVer, type, lib, repEntry, versForce) 2: Installation of package RBGL had non-zero exit status in: installPkg(fileName, pkg, pkgVer, type, lib, repEntry, versForce) 3: Installation of package Ruuid had non-zero exit status in: installPkg(fileName, pkg, pkgVer, type, lib, repEntry, versForce) 4: Installation of package affy had non-zero exit status in: installPkg(fileName, pkg, pkgVer, type, lib, repEntry, versForce) 5: Installation of package genefilter had non-zero exit status in: installPkg(fileName, pkg, pkgVer, type, lib, repEntry, versForce) 6: Installation of package multtest had non-zero exit status in: installPkg(fileName, pkg, pkgVer, type, lib, repEntry, versForce) 7: Installation of package rhdf5 had non-zero exit status in: installPkg(fileName, pkg, pkgVer, type, lib, repEntry, versForce)