Does Petsc built with MPICH2 work in a single processor box?

Barry Smith bsmith at
Sat Oct 11 19:52:14 CDT 2008

    Looks like you may not have the proper MPICH demons running on  
this "uniprocessor"


On Oct 11, 2008, at 6:03 PM, Thuc Bui wrote:

> Hi all,
> I am able to build Petsc-2.3.3-p15 with MPICH2 under Windows and  
> make it a
> DLL. It works great with my app in a dual core laptop. However, when  
> the
> same executable runs on a uniprocessor windows box, it gives me the
> following errors:
> ...
> [0] Error creating mpiexec process...2
> [0] launchMpiexecProcess failed
> Fatal error in MPI_Init: Other MPI error, error stack:
> MPIR_Init_thread(294): Initialization failed
> MPID_Init(82)........: channel initialization failed
> MPID_Init(383).......: PMI_Get_id returned 1
> ...
> Are these errors due to PatscInitialize() failing to initialize MPI  
> on a
> single processor box?
> If this is the case, is there a way in PetscInitialize or else where  
> to turn
> off MPI without having to recompile Petsc with the option --with- 
> mpi=0?
> Many thanks in advance for your help,
> Thuc Bui

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