i having issues installing Rgraphviz. i installed the prereqs from the at&t bell labs. the latest. i'm using R 1.8. below are my error messages. any help will be appreciated. thanks, -- Yectli * Installing *source* package 'Rgraphviz' ... ** libs `Rgraphviz.so' is up to date. ** R ** inst ** save image Loading required package: graph Error in bindingIsLocked(m1, where) : not an environment Error in setClass("graphNEL", representation(nodes = "vector", edgeL = "list"), : Error in contained classes ("graph") for class "graphNEL"; class definition removed from "graph" [1] FALSE Loading required package: graph Error in bindingIsLocked(m1, where) : not an environment Error in setClass("graphNEL", representation(nodes = "vector", edgeL = "list"), : Error in contained classes ("graph") for class "graphNEL"; class definition removed from "graph" Error: Rgraphviz requires package graph Execution halted ERROR: execution of package source for 'Rgraphviz' failed ** Removing '/soft/local/lib/R/library/Rgraphviz'