I have an odd problem I have not encountered before. I have some data (ulonarr) with no values higher than 50,000. I am writing this data to an unformatted file and after reading the data back some of the values are changed. I now have values that are extremely large (3x10^8). I have used this code on previous occasions without any issue, so I am currently at a loss as to what could be causing this. -Steve