[petsc-users] Help with mpiexec

[Jed Brown]

On Sat, Oct 13, 2012 at 3:19 PM, Matthew Knepley <knepley at gmail.com> wrote:

> On Sat, Oct 13, 2012 at 3:17 PM, George Mathew <gmnnus at gmail.com> wrote:
>
>> I have petsc 3.3 and mpich2 version 1.4.1p1 installed.
>> When I run the example ex2.c code in the petsc user manual, it runs one
>> one machine format. But, if I chose to run on multiple nodes, it gives
>> error.
>> The example is the file ${PETSC}/src/ksp/ksp/examples/tutorials/ex2.c.
>> I compiled it and when run using the following command, it works.
>> mpiexec -f machinefile -n 1 ./ex2
>> But, if I run it using the command
>> mpiexec -f machinefile -n 2 ./ex2
>> I get the following error.
>>
>
> It is very likely that you are running the code with the wrong mpiexec
> (from another MPI installation).
> I cannot tell which MPI you used with configure.log.
>

Can you also try

1. Run multiple processes on your local machine

2. Run with -skip_petscrc
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