Hi, When trying to run RMA normalization using GeneSpring EPI, I get an error message as follows: Error in if ((is.null(deps)) || (length(deps) == 0) || (deps == "")) return(NULL) : missing value where TRUE/FALSE needed Do you know why this happens and what I can do about it? Thanks for your help! Madeleine Madeleine Gross, PhD Technical Support Scientist Silicon Genetics 2601 Spring Street mgross@silicongenetics.com tel: fax: 866-744-7638 650-365-1735 For more support information, please visit our website at http://www.silicongenetics.com/Support/