Hello, I am using R Version 1.7.0 on SunOS Release 5.8. For the past one week, I have had no problems loading library(affy). Please help !! But as of May 03, 2003 I get the following message when I type in library(affy). It seems to repeat the e1[i] and firstlib error once : Creating a new generic function for "summary" in package reposTools Synching your local package management information ... Error in if (e1[i] != e2[i]) return(TRUE) : missing value where TRUE/FALSE needed Error in firstlib(which.lib.loc, package) : Package reposTools required Welcome to Bioconductor Vignettes contain introductory material. To view, simply type: openVignette() For details on reading vignettes, see the openVignette help page. Creating a new generic function for "summary" in package reposTools Synching your local package management information ... Error in if (e1[i] != e2[i]) return(TRUE) : missing value where TRUE/FALSE needed Error in firstlib(which.lib.loc, package) : Package reposTools required Error in reconcilePropertiesAndPrototype(name, slots, prototype, superClasses) : Class "AffyBatch" extends an undefined class ("exprSet" Error in library(affy) : .First.lib failed

> But as of May 03, 2003 I get the following message when I type in > library(affy). It seems to repeat the e1[i] and firstlib error once : This error looks to be from the VersionNumber code in reposTools in that it is most likely trying to compare something that's not really a VersionNumber for some reason. Can you provide a bit more information: - I am assuming that you updated packages on May 3? If so, which ones (or all of them?) - When was the last time you had updated packages before then? Thanks -J