Hi, I recently updated R v2.3 and BioConductor 1.8. I tried to use justGCRMA, but it's giving me the following error. My code has always worked in the past. Can someone help point out my error? Thank you, Edmund Chang > pd <- read.phenoData("pheno.txt", header=TRUE, row.names=1) > eset <-justGCRMA(filenames= rownames (pData(pd)), phenoData= pd, verbose=T) Error in .Call("ReadHeader", filenames[[1]], compress, PACKAGE = "affy") : C entry point "ReadHeader" not in DLL for package "affy" > sessionInfo() Version 2.3.0 (2006-04-24) i386-pc-mingw32 attached base packages: [1] "tools" "methods" "stats" "graphics" "grDevices" "utils" [7] "datasets" "base" other attached packages: hgu133acdf gcrma matchprobes affy affyio Biobase "1.12.0" "2.4.0" "1.4.0" "1.10.0" "1.0.0" "1.10.0" RWinEdt "1.7-4"