Dear Members, I am getting the following error, when I run hgu133aACCNUM() function. Error: couldn't find function "hgu133aACCNUM" I have package "hgu133a" installed and loaded. Thank you. Sohail Khan Scientific Programmer COLD SPRING HARBOR LABORATORY Genome Research Center 500 Sunnyside Boulevard Woodbury, NY 11797 (516)422-4076