HI list, I have a data set that seems to cause a problem with rma (and also justRMA) in that it crashes R. I have upgraded to current versions of the software, to see if this fixes it. Unfortunately it doesnt. The data consists of 52 ecoli affy arrays. Does anyone have any suggestions as to how I can tracke down the problem? >R.version platform i686-pc-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major 1 minor 8.1 year 2003 month 11 day 21 language R >library(affy) package.description("affy")["Version"] "1.3.26" >library(ecoliasv2cdf) >package.description("ecoliasv2cdf")["Version"] "1.3.1" data<-ReadAffy(celfile.path ="../original/CEL_files/") X<-rma(data) Background correcting Normalizing Calculating Expression Process R segmentation fault at Wed Dec 10 14:48:52 2003 -- Rob Dunne Fax: +61 2 9325 3200 Tel: +61 2 9325 3263 CSIRO Mathematical and Information Sciences +61 2 9325 3100 Locked Bag 17, North Ryde, New South Wales, Australia, 1670 Email: Rob.Dunne@csiro.au Java has certainly revolutionized marketing and litigation.