hi, I was using gretl with GNU R and found that when the data is uploaded using the read.table() function if didnt use the header=T argument. This meant that the variables are treated as character by default. PLease try to incorporate this small modification. Thanks to the developers for a great package. cheers Ashok -- ASHOK RAGAVENDRAN Graduate Research Assistant Dept. of Fisheries and Wildlife, Michigan State University East Lansing MI 48824 706-207-9490 ragavend(a)msu.edu