I am running a fortran 77 program on my pentium 4 which is running redhat9.0. My program returns bunk (nan everywhere). I believe it is because I have not figured out a way to set the real and integer data type to 8 Bytes. On my old irix machine running f77 I would put: f77 -i8 -r8 Is there anything similiar to this for g77? Thanks, Dylan Powell UMBC Physics Department