Did you recompile the MPI libraries? Did you re configure and
compile ALL of PETSc after the change? You will need to do all this.
Barry
On Jun 25, 2009, at 1:30 PM, Yixun Liu wrote:
> Hi,
> My PETSc based application can work correctly, but after system
> updating
> when I use the same commands:
>> lamboot
>> mpiexec -np 4 application
>
> It seems only one processor works. Then I test it using the
> following code,
>
> **********
> PetscErrorCode ierr =
> MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRQ(ierr);
>
> COUT << "This is processor : " << rank << ENDL;
>
> Use command: mpiexec -np 4 application,
> The output is:
> This is processor : 0
> This is processor : 0
> This is processor : 0
> This is processor : 0
> *********
>
> Thanks for your help.
>
> Yixun
>
>
