On Tue, Sep 16, 2008 at 10:21 AM, Joe Wilck <joe.wilck@gmail.com> wrote: > I tried those options that you mentioned. > > I also ran the program with f951.exe. And it stated that the compiled > version of the program cannot start or run due to incompatibility with > 64-bit versions of Windows. What version of gcc are you using? Run this: gfortran -v