Okay, so you know something's going wrong with the read. Next step is to find out what! I can't answer this as I don't have (or want) access to your data file. So have you checked... - that the data's kosher - what you really think's in the file is in the file - that the compiler's not making some assumptions about the size of data objects? That code looks so old it might be a 16 bit relic or the compiler may have made different assumptions about structure packing and so on... Cheers, Ash
