Hans-Peter I have checked the 'library(xlsReadWrite)' startup message. I found that I just failed to 'xls.getshlib()'. Entering 'xls.getshlib()', read.xls() works regularly. Thank you. -- View this message in context: http://r.789695.n4.nabble.com/ReadWrite-xls-problem-tp3078348p3082108.html Sent from the R help mailing list archive at Nabble.com.