I'm trying to get mpiexec working on our cluster. I downloaded the version for mpich 1.2.5..10, and I'm using PBS Pro 5.3 The job I'm trying to run works fine with mpirun.ch_gm, but I get errors like this when I try to use mpiexec: mpiexec: Warning: main: task 26 died with signal 15. mpiexec: Warning: main: task 54 died with signal 15. does anyone have any ideas?