When using the Li Wong algorithm in Bioconductor (specifically, liwong<- expresso(data,normalize.method="invariantset", bg.correct=FALSE,pmcorrect.method="pmonly",summary.method="liwong") I got the error: No convergence acheived in outlier loop in : fit.li.wong(probes,...) I understand that this algorithm will fail to converge for some probe sets, but is it possible to find out WHICH (or how many) probe sets failed to converge? Ann Hess