Thank you very much for your reply. Yes. See this [1]. Liviu [1] http://cran.r-project.org/doc/manuals/R-exts.pdf -- View this message in context: http://www.nabble.com/Re%3A--Rd--How-to-create-a-permanent-dataset-in-R.-tp24649306p24678083.html Sent from the R help mailing list archive at Nabble.com.