I wrote some R code that runs just fine on a friend's RAqua (MacOSX) but will never run on mine. This made me think there could have been a problem with my installation or version, so I went to http://cran.r-project.org/bin/macosx/ and downloaded the RAqua.dmg file (version 1.8.1) I upgraded RAqua by installing all four packages - but the problem persists. Would it help to uninstall completely before installing the new version? How does one uninstall RAqua completely? I see there are files in my applications folder and in usr/local/bin... Should it be enough to remove those files? I tried that too, and again, the problem persists? Any help will be greatly appreciated. Best, Goncalo