Yes I do have lots of other functions but they are rather discrete. So most of the part I have to individually fix them if something goes wrong. Thanks though :/ And as far as what you said, I didnt know of such a thing so I tried to close the file before using tie but it seemed to produce no effect. Still the last remaining of my data is kept in buffer until I close the program... And for the other part, I tried using \* without closing the file before hand but this time the tie didnt work and the array wasnt created. Strange :/ I will read more on the link you have given, thanks.