HI, I installed Rgraphviz_1.20.2.zip without error on Windows Vista 32 bits Centrino duo with 2Gb RAM. But when I tryed to load the library: library(Rgraphviz) I got the following error: Error in get(hookname, envir = env, inherits = FALSE) : cannot allocate memory block of size 2.2 Gb Error: package/namespace load failed for 'Rgraphviz' This happens on an clean R session without anything loaded. When I tryed to install the Rgraphviz from Bioconductor 2.2 Rgraphviz_1.18.1.zip, instllation succeded but the loading of the library produced an other error: > library(Rgraphviz) Loading required package: graph Loading required package: grid Error in inDL(x, as.logical(local), as.logical(now), ...) : unable to load shared library 'C:/R/R-2.8.0/library/Rgraphviz/libs/Rgraphviz.dll': LoadLibrary failure: Unable to find the specified module. Error : .onLoad failed in 'loadNamespace' for 'Rgraphviz' Error: package/namespace load failed for 'Rgraphviz' Loading of the Rgraphviz lib was instead successful using Rgraphviz_1.16.0.zip from Bioconductor 2.1 Any suggestion how to solve Rgraphviz loading problem? Raffaele ###################################################################### ############## > sessionInfo() R version 2.8.0 (2008-10-20) i386-pc-mingw32 locale: LC_COLLATE=Italian_Italy.1252;LC_CTYPE=Italian_Italy.1252;LC_MONETARY= Italian_Italy.1252;LC_NUMERIC=C;LC_TIME=Italian_Italy.1252 attached base packages: [1] grid stats graphics grDevices utils datasets methods [8] base other attached packages: [1] graph_1.20.0 loaded via a namespace (and not attached): [1] cluster_1.11.11 tools_2.8.0 > -- ---------------------------------------- Prof. Raffaele A. Calogero Bioinformatics and Genomics Unit Dipartimento di Scienze Cliniche e Biologiche c/o Az. Ospedaliera S. Luigi Regione Gonzole 10, Orbassano 10043 Torino tel. ++39 0116705417 Lab. ++39 0116705408 Fax ++39 0119038639 Mobile ++39 3333827080 email: raffaele.calogero at unito.it raffaele[dot]calogero[at]gmail[dot]com www: http://www.bioinformatica.unito.it Info: http://publicationslist.org/raffaele.calogero