arpack - how to run an MPI example in PARPACK -

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i able compile psndrv1.f, example in arpack/parpack/example/mpi folder. however, when run program command mpirun -np 4 a.out, got following error.

[.th:9951] *** error occurred in mpi_allreduce [.th:9951] *** on communicator mpi_comm_world [.th:9951] *** mpi_err_op: invalid reduce operation [.th:9951] *** mpi_errors_are_fatal: mpi job abort -------------------------------------------------------------------------- mpirun has exited due process rank 0 pid 9951 on node superinfra.ku.ac.th exiting improperly. there 2 reasons oc cur:  1. process did not call "init" before exiting, others in job did. can cause job hang indefinitely while waits processes call "init". rule, if 1 process calls "init", processes must call "init" prior termination.  2. process called "init", exited without calling "finalize". rule, processes call "init" must call "finalize" prior exiting or considered "abnormal termination"  may have caused other processes in application terminated signals sent mpirun (as reported here). -------------------------------------------------------------------------- [.th:09950] 3 more processes have sent message help-mpi-err ors.txt / mpi_errors_are_fatal [.th:09950] set mca parameter "orte_base_help_aggregate" 0  see / error messages

i'm using rock cluster. please help.


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