Hi I am using vst from lumi package and got this problem: Error in lm.fit(x, y, offset = offset, singular.ok = singular.ok, ...) : 0 (non-NA) cases I checked previous post and it seems it is due to the version, but after check my version(see below), it still has that problem> > sessionInfo() R version 2.9.2 (2009-08-24) i386-apple-darwin8.11.1 locale: en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8 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 preprocessCore_1.6.0 [5] mgcv_1.5-6 affy_1.22.1 annotate_1.22.0 AnnotationDbi_1.6.1 [9] 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_3.1-94 tools_2.9.2 xtable_1.5-5 -- Weiwei Shi, Ph.D Research Scientist GeneGO, Inc. "Did you always know?" "No, I did not. But I believed..." ---Matrix III [[alternative HTML version deleted]]