Haleh, This question would be better asked on the Bioconductor mailing list. You haven't told us what version of R you are using. I suspect you have a version mismatch.
With R 2.2.x you should be able to do the following to get MergeMaid installed: >From the R prompt do: source("http://bioconductor.org/biocLite.R") biocLite("MergeMaid") And if you have further questions, please review the posting guide__ and then send a msg to the bioc list! __ http://www.bioconductor.org/docs/postingGuide.html Best, + seth ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html