[mvapich-discuss] Q: MPI_ALLGATHERV causes Invalid communicator & comm=0x0

[Manfred Muecke]

Hi,

I have the following problem and ran out of ideas. Maybe someone can help
with some advice.

I get the following error message from all instances of my MPI-program
(FORTRAN90), using MVAPICH2 1.0 (compiled with "mpe=mpicheck"):

Invalid communicator, error stack:
MPI_Comm_rank(107): MPI_Comm_rank(comm=0x0, rank=fffffd7fffdfd2bc) failed
MPI_Comm_rank(65).: Invalid communicator

The error is caused by a call to MPI_ALLGATHERV. It was discussed here
that a similiar looking error is caused by including the wrong mpi.h. This
one differs however in that comm=0x0 (the actual value of the communicator
was 1140850688).

"mpif90 -show" gives:

/opt/local/SunStudio12/SUNWspro/bin/f90
-xO3 -xtarget=opteron -m64
-I/opt/local/MVAPICH/mvapich2-1.0/include
-xO3
-M/opt/local/MVAPICH/mvapich2-1.0/include
-L/opt/local/MVAPICH/mvapich2-1.0/lib
-lmpichf90 -lmpichf90 -lmpich
-L/usr/lib/amd64
-L/usr/ucblib/amd64
-lsocket -lnsl -lresolv -lpthread -ldat -lrt -lnsl -lsocket

I have checked thoroughly and can not find any mpi.h from other
installations interfering. Any other ideas?

Thanks for your help, Manfred




-- 
Manfred Mücke                manfred.muecke at univie.ac.at
Research Lab Computational Technologies and Applications
rlcta.univie.ac.at      Lenaugasse 2, 1080 Wien, AUSTRIA