Hello, I just figured out that there was some problem with my dataset. So, the Regression is working fine now. Thanks a lot for all your help and suggestions. Uttara -- View this message in context: http://r.789695.n4.nabble.com/Error-in-eval-expr-envir-enclos-tp2547917p2550252.html Sent from the R help mailing list archive at Nabble.com.