Hi, I'm running > sessionInfo() R version 2.6.0 (2007-10-03) i386-apple-darwin8.10.1 locale: en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] stats graphics grDevices utils datasets methods base I have two libraries: (1) /Users/mk/R/i386-apple-darwin8.10.1-library/2.6/ and (2) /Library/Frameworks/R.framework/Versions/2.6/Resources/library/ When I try to load a recently-installed package (plotAndPlayGTK) which got installed in (1) it tries to load RGtk2 which is in (2) and it fails. I would like advice on how to consolidate these two in (2) and make (2) the default library (if that's adivsable) and how to make the upgrade to future versions of R as trouble-free as possible. _____________________________ Professor Michael Kubovy University of Virginia Department of Psychology USPS: P.O.Box 400400 Charlottesville, VA 22904-4400 Parcels: Room 102 Gilmer Hall McCormick Road Charlottesville, VA 22903 Office: B011 +1-434-982-4729 Lab: B019 +1-434-982-4751 Fax: +1-434-982-4766 WWW: http://www.people.virginia.edu/~mk9y/