Dear All, I am using the official version of Oxmetrics 5.1 and although I am able to read large csv files I am unable to save to a csv file with more than approx. 65,000 rows (the row limit for pre 2007 versions of Excel). However, an acquaintance of mine is using a downloaded version of Oxmetrics 6 and can write to much larger csv files. Is this something which has been made possible with later versions of Oxmetrics or am I doing something wrong? Thanks a lot, Dave.