Hi, I e-mailed earlier about the IO String input but am still unable to get anything to work Thanks for the e-mails back but I still haven't got a grasp of what to do.Here is a more detailed explanation as I may have been rather vague last time! I have a file of the following format :- Surname , Forename , Age , Height e.g. <String>, <String>, <Int> , <Int> I have a tuple called Person which is defined as (String,String,Int,Int) as you would expect. What I want to do is to create a function which will 1 take a line from the file 2 create a Person tuple from the read information I have defined functions to perform an insertion sort given a tuple of the above specification. Thanks for your time in explaining this to me Graeme Turner