[mpich-discuss] Problem with MPI_GATHER on multiple machines (F90)

[Chavez, Andres]

When restricted to running on one machine, my F90 program works perfectly,
but when I try to have it run on multiple machines the problem below
occurs.  I can't figure out what is going wrong, any help will be greatly
appreciated thank you.
*
Fatal error in PMPI_Gather: Other MPI error, error stack:
PMPI_Gather(863)..................: MPI_Gather(sbuf=0xeb59a0, scount=512,
MPI_DOUBLE_COMPLEX, rbuf=(nil), rcount=512, MPI_DOUBLE_COMPLEX, root=0,
MPI_COMM_WORLD) failed
MPIR_Gather_impl(693).............:
MPIR_Gather(655)..................:
MPIR_Gather_intra(283)............:
MPIC_Send(66).....................:
MPIC_Wait(540)....................:
MPIDI_CH3I_Progress(402)..........:
MPID_nem_mpich2_blocking_recv(905):
MPID_nem_tcp_connpoll(1838).......:
state_listening_handler(1908).....: accept of socket fd failed - Invalid
argument
Fatal error in PMPI_Gather: Other MPI error, error stack:
PMPI_Gather(863)..........: MPI_Gather(sbuf=0x25d39e0, scount=512,
MPI_DOUBLE_COMPLEX, rbuf=0x25bd9b0, rcount=512, MPI_DOUBLE_COMPLEX, root=0,
MPI_COMM_WORLD) failed
MPIR_Gather_impl(693).....:
MPIR_Gather(655)..........:
MPIR_Gather_intra(202)....:
dequeue_and_set_error(596): Communication error with rank 1*
*
These are all the instances of MPI_GATHER*
call
MPI_GATHER(xi_dot_matrix_transp,na*n_elements*nsd/numtasks,MPI_DOUBLE_COMPLEX,xi_dot_matrix_gath,&
     na*n_elements*nsd/numtasks,MPI_DOUBLE_COMPLEX,0,MPI_COMM_WORLD,ierr)
call
MPI_GATHER(Matrix_A_hat_3d_transp,5*na*size_matrix*nsd/numtasks,MPI_DOUBLE_COMPLEX,&

Matrix_A_hat_3d_gath,5*na*size_matrix*nsd/numtasks,MPI_DOUBLE_COMPLEX,0,MPI_COMM_WORLD,ierr)
call
MPI_GATHER(JR_matrix_transp,5*na*size_matrix*nsd/numtasks,MPI_INTEGER,JR_matrix_gath,&
     5*na*size_matrix*nsd/numtasks,MPI_INTEGER,0,MPI_COMM_WORLD,ierr)
call
MPI_GATHER(JC_matrix_transp,5*na*size_matrix*nsd/numtasks,MPI_INTEGER,JC_matrix_gath,&
     5*na*size_matrix*nsd/numtasks,MPI_INTEGER,0,MPI_COMM_WORLD,ierr)
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