[gmx-users] internal MPI error: GER overflow

David spoel at xray.bmc.uu.se
Tue Sep 24 08:08:47 CEST 2002

On Tue, 2002-09-24 at 06:30, Erik Lindahl wrote:
> Hi,
> >
> > NNODES=16, MYRANK=11, HOSTNAME=node11
> > NNODES=16, MYRANK=13, HOSTNAME=node13
> > MPI_Isend: internal MPI error: GER overflow (rank 5, MPI_COMM_WORLD)
> > NNODES=16, MYRANK=4, HOSTNAME=node04
> > NNODES=16, MYRANK=3, HOSTNAME=node03
> > ----------------------------------------------------------------------------- 
There is a flag for mpirun -nger IIRC
However, it can be caused by anything: bug in gromacs or in lam, or
hardware error. Is the bug reproducable? After how many steps of md does
it occur?

> >
> As the message says, it's an internal MPI error and not in Gromacs. I 
> have never seen it myself; unless somebody else
> on the list knows what it is, your best bet is probably to
> 1) recompile the latest version of LAM-MPI (or mpich), fftw and gromacs
> 2) Contact the LAM-MPI authors at www.lam-mpi.org if it doesn't work out :-)

Since you have lam 6.5.6 I assume you have compiled gromacs yourself:
otherwise you may have incomaptibility between lam versions (i.e.
gromacs compiled with another lam version than the one you are using or
lmboot etc.)

Groeten, David.
Dr. David van der Spoel, 	Biomedical center, Dept. of Biochemistry
Husargatan 3, Box 576,  	75123 Uppsala, Sweden
phone:	46 18 471 4205		fax: 46 18 511 755
spoel at xray.bmc.uu.se	spoel at gromacs.org   http://zorn.bmc.uu.se/~spoel

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