Hi, I use R 1.5.* before,everything works great. after I upgrade to 1.6. I find I problem. in dos command windows, when I try: Rcmd BATCH file1 file2 I will get a error message which say"perl is not recognize as an internal or external command,operable program or batch file" please help me! Thank you Tao Hou __________________________________________________ Faith Hill - Exclusive Performances, Videos & More -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._