I am trying to run a fortran 77 program on my pentium 4 processor running redhat 9.0 using g77. The data my program returns is bunk ("nan" everywhere. I believe it has to do with the g77 compiler and my inability to set the real and integer data types to 8 Bytes. The program runs fine on my old IRIX fortran compiler with the command: f77 -i8 -r8 -o a.out blah.f Is there any way to set the data types in g77 to store 8 Bytes? Anything similiar to the above? Im sorry if youve revieved this email several times, Im having trouble with my server. Thanks, Dylan Powell UMBC/JCET