On Wed, Feb 3, 2010 at 9:25 AM, Jon Forrest <jlforrest at berkeley.edu> wrote: > Although I can compile and run a simple fortran > "Hello, world" program using the version of > gfortran I built this way, trying to run a > more complex application, such as charmm (a molecular > dynamics program), fails. When I run charmm, I get the > message "Killed". Regarding the compilation question, you may want to try the CHARMM forums at: http://www.charmm.org/ubbthreads/ubbthreads.php?ubb=cfrm I could ask around at my work place (one of the developers used to work here), but it will probably be much quicker if you use the forums. Akemi