Hi, We have custom code that creates LumiBatch objects from data. First, we create an AnnotatedDataFrame for both phenoData and featureData. Then we create the LumiBatch this way: lumiBatch <- new( "LumiBatch", exprs = signalRaw, se.exprs = beadSD, featureData = featureData, phenoData = phenoData ) In R 2.9.2 we are getting the following error message: error in sample names<= tmp value = c (sample 1 sample 2 sample 3) value length (8) must equal sample number in assay data (0). I have a question for lumi developers, were there changes in the most recent version of the lumi package that would make such code stop working? I can send the entire script, but I thought that maybe it isn't necessary (in the case when this is a known change in behavior). Here's the sessionInfo(): R version 2.9.2 (2009-08-24) i386-pc-mingw32 locale: LC_COLLATE=English_Canada.1252;LC_CTYPE=English_Canada.1252;LC_MONETAR Y=English_Canada.1252;LC_NUMERIC=C;LC_TIME=English_Canada.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] lumi_1.10.2 RSQLite_0.7-2 DBI_0.2-4 [4] preprocessCore_1.6.0 mgcv_1.5-5 affy_1.22.1 [7] annotate_1.22.0 AnnotationDbi_1.6.1 Biobase_2.4.1 loaded via a namespace (and not attached): [1] affyio_1.12.0 grid_2.9.2 lattice_0.17-25 nlme_3.1-93 [5] tools_2.9.2 xtable_1.5-5 Best, Michal