LAM: segmentation fault launching mpi program

Hello all,
I have a very basic and perhaps naive question regarding
running a lam/mpi
program. I am compiling code that I plan to use as an end
user.  The code
compiles perfectly using mpicc, but when I run it it reports
the
following:
MPI process rank 0 (n0, p18977) caught a SIGSEGV in
MPI_Errhandler_set.
Rank (0, MPI_COMM_WORLD): Call stack within LAM:
Rank (0, MPI_COMM_WORLD):  - MPI_Errhandler_set()
Rank (0, MPI_COMM_WORLD):  - main()
I've compiled the code on another machine using lam-mpi and
it works just
fine, so I strongly suspect the issue is my usage of mpi. 
My only guess
is that this is a memory allocation problem.  Any
suggestions would be
greatly appreciated.
Thanks!

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On Mar 18, 2007, at 8:30 PM, wkbrowneberkeley.edu wrote:

> Hello all,
> I have a very basic and perhaps naive question
regarding running a  
> lam/mpi
> program. I am compiling code that I plan to use as an
end user.   
> The code
> compiles perfectly using mpicc, but when I run it it
reports the
> following:
> MPI process rank 0 (n0, p18977) caught a SIGSEGV in  
> MPI_Errhandler_set.
> Rank (0, MPI_COMM_WORLD): Call stack within LAM:
> Rank (0, MPI_COMM_WORLD):  - MPI_Errhandler_set()
> Rank (0, MPI_COMM_WORLD):  - main()
> I've compiled the code on another machine using lam-mpi
and it  
> works just
> fine, so I strongly suspect the issue is my usage of
mpi.  My only  
> guess
> is that this is a memory allocation problem.  Any
suggestions would be
> greatly appreciated.

You're probably correct that it's a problem with memory
allocation.   
I'm not exactly sure why it would segfault there (I'd almost
expect  
it to do so when creating the error handler).  Can you
compile LAM  
with the --with-purify configure option and try running your
 
application under valgrind?  Would probably help to find the
memory  
error.

Brian
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