Hi, I m trying to use the last affy 1.4.9 package for windows under the last R1.9 dev here is the first message I get when I enter library(affy) The procedure entry point pow could not be located in the dynamic link library R.dll. then I click on OK and obtain the following in R window: Error in dyn.load(x, as.logical(local), as.logical(now)) : unable to load shared library "C:/PROGRA~1/R/RW1090~1/library/affy/libs/affy.dll": LoadLibrary failure: The specified procedure could not be found. Error in library(affy) : .First.lib failed Is it related to a R problem or to a "affy" package problem ? or something else ? Thanks and happy new year 2004 to everyone from this very helpful group Philippe [[alternative HTML version deleted]]