I am having difficulty installing the arm package and would be grateful if anyone could give some advice. I have updated my computer to a Mac OS X version 10.5.5 ( processor: 2 x 2.8 GHz Quad-Core Intel Xeon) and I have downloaded R version 2.8.0 I have downloaded the package arm, but when i try to install it, the following message is given in R: Loading required package: MASS Loading required package: Matrix Loading required package: lattice *** caught bus error *** address 0xc, cause 'non-existent physical address' Traceback: 1: dyn.load(file, DLLpath = DLLpath, ...) 2: library.dynam(lib, package, package.lib) 3: loadNamespace(package, c(which.lib.loc, lib.loc), keep.source = keep.source) 4: doTryCatch(return(expr), name, parentenv, handler) 5: tryCatchOne(expr, names, parentenv, handlers[[1]]) 6: tryCatchList(expr, classes, parentenv, handlers) 7: tryCatch(expr, error = function(e) { call <- conditionCall(e) if (!is.null(call)) { if (identical(call[[1]], quote(doTryCatch))) call <- sys.call(-4) dcall <- deparse(call)[1] prefix <- paste("Error in", dcall, ": ") LONG <- 75 msg <- conditionMessage(e) sm <- strsplit(msg, "\n")[[1]] if (14 + nchar(dcall, type = "w") + nchar(sm[1], type = "w") > LONG) prefix <- paste(prefix, "\n ", sep = "") } else prefix <- "Error : " msg <- paste(prefix, conditionMessage(e), "\n", sep = "") .Internal(seterrmessage(msg[1])) if (!silent && identical(getOption("show.error.messages"), TRUE)) { cat(msg, file = stderr()) .Internal(printDeferredWarnings()) } invisible(structure(msg, class = "try-error"))}) 8: try({ ns <- loadNamespace(package, c(which.lib.loc, lib.loc), keep.source = keep.source) dataPath <- file.path(which.lib.loc, package, "data") env <- attachNamespace(ns, pos = pos, dataPath = dataPath)}) 9: library(pkg, character.only = TRUE, logical.return = TRUE, lib.loc = lib.loc) 10: .getRequiredPackages2(pkgInfo) 11: library(arm) Possible actions: 1: abort (with core dump, if enabled) 2: normal R exit 3: exit R without saving workspace 4: exit R saving workspace > Selection: Can anyone please advise? Erica Donnelly-Swift SAHRU Department of Public Health & Primary Care Trinity College Dublin Tel:01-8968510 email: donneler at tcd.ie