Hi all, A bug in gcrma that affected justGCRMA() has been fixed in gcrma_2.4.1, which is now in the 1.8 release repository. Anybody who uses this function should upgrade. Best, Jim James W. MacDonald, M.S. Biostatistician Affymetrix and cDNA Microarray Core University of Michigan Cancer Center 1500 E. Medical Center Drive 7410 CCGC Ann Arbor MI 48109 734-647-5623 ********************************************************** Electronic Mail is not secure, may not be read every day, and should not be used for urgent or sensitive issues.