[CIG-SEISMO] Laplacian error in xmeshfem3D

[Steve Smith]

Dr. Komatitsch,

I've built the SPECFEM3D package up through the meshing stage on my 32 
bit Fedora Core 3 cluster with IFORT v9.0 and MPICH-1.2.7 (vintage 2005).

As you know, I am attempting to run xmeshfem3D to generate a sample mesh 
file. I need to know the mesh format so that I can convert COMSOL/ELMER 
meshes or geometry files to be run in SPECFEM3D. I have built/run the 
mesher for use with the default haukson_model files as given in 
DATA/Par_file.

On my multicore desktop, MPI xmeshfem3D with the included Par_file and 
go_mesher script failed with 3D Laplacian errors followed by MPI_Abort 
communicator errors. The same error occurred on the cluster.


Therefore, I compiled for serial execution on a single cluster node using 
the --without-mpi switch. Changes I made to the included files were:

1) the "mymachines" file lists my cluster nodes (standard),

2) the LOCAL_PATH variable in the Par_file points to 
/scratch/<my username>/DATABASES_MPI instead of 
/scratch/komatits/DATABASES_MPI

3) NPROC_XI and NPROC_ETA were set to 1

The OUTPUT_FILES/error_message00000.txt for serial execution reads:
--------------------------------------------------
3D Jacobian undefined
  Error detected, aborting MPI... proc            0
--------------------------------------------------

Computation of the 3D Jacobian within the mesher seems to be the problem. 
This error preceeds the stdio MPI_Abort(MPI_COMM_WORLD, 30) errors when 
the mesher runs with MPICH1 and MPICH2 on the cluster or my multicore 
desktop using NPROC_XI=NPROC_ETA=2

--------------------------------------------------
  3D Jacobian undefined
  Error detected, aborting MPI... proc            2
--------------------------------------------------

I am unable to diagnose this any further. What files/output would be 
helpful in this case? I will cc this to the CIG-SEISMO list.

Again, thank you for your help.

Respectfully,

-Steve Smith
Geophysics Ph.D. Student
Center for Wave Phenomena
Colorado School of Mines
stesmith   AT   mines.edu