> mpirun -np 2 perl init.pl asdada Fatal error in MPI_Errhandler_set: Invalid communicator, error stack: MPI_Errhandler_set(121): MPI_Errhandler_set(comm=0x5b, errh=0x78) failed MPI_Errhandler_set(72).: Invalid communicator[unset]: aborting job: Fatal error in MPI_Errhandler_set: Invalid communicator, error stack: MPI_Errhandler_set(121): MPI_Errhandler_set(comm=0x5b, errh=0x78) failed MPI_Errhandler_set(72).: Invalid communicator Fatal error in MPI_Errhandler_set: Invalid communicator, error stack: MPI_Errhandler_set(121): MPI_Errhandler_set(comm=0x5b, errh=0x78) failed MPI_Errhandler_set(72).: Invalid communicator[unset]: aborting job: Fatal error in MPI_Errhandler_set: Invalid communicator, error stack: MPI_Errhandler_set(121): MPI_Errhandler_set(comm=0x5b, errh=0x78) failed MPI_Errhandler_set(72).: Invalid communicator