[petsc-users] [SLEPc] SIGFPE Arithmetic exception in EPSGD

Harshad Sahasrabudhe harshad.sahasrabudhe at gmail.com
Thu May 3 22:24:15 CDT 2018


Hi Barry,

There's an overflow in the division:

Program received signal SIGFPE, Arithmetic exception.
0x00002aaab377ea26 in dvd_improvex_jd_lit_const_0 (d=0x1d29078, i=0,
theta=0x1f396f8, thetai=0x1f39718, maxits=0x7fffffff816c,
tol=0x7fffffff8140)
    at
/depot/ncn/apps/conte/conte-gcc-petsc35-dbg/libs/slepc/build-real/src/eps/impls/davidson/common/dvd_improvex.c:1112
1112   if (d->nR[i]/a < data->fix) {

(gdb) p d->nR[i]
$7 = 1.7976931348623157e+308
(gdb) p a
$8 = 0.15744695659409991

It looks like the residual is very high in the first GD iteration and
rapidly drops in the second iteration

240 EPS nconv=0 first unconverged value (error) 0.0999172 (1.11889357e-12)
241 EPS nconv=1 first unconverged value (error) 0.100311 (1.79769313e+308)
242 EPS nconv=1 first unconverged value (error) 0.100311 (2.39980067e-04)

Thanks,
Harshad

On Thu, May 3, 2018 at 11:11 PM, Smith, Barry F. <bsmith at mcs.anl.gov> wrote:

>
>  at /depot/ncn/apps/conte/conte-gcc-petsc35-dbg/libs/slepc/
> build-real/src/eps/impls/davidson/common/dvd_improvex.c:1112
> 1112      if (d->nR[i]/a < data->fix) {
>
> Likely the problem is due to the division by a when a is zero. Perhaps the
> code needs above a check that a is not zero. Or rewrite the check as
>
> if (d->nR[i] < a*data->fix) {
>
>    Barry
>
>
> > On May 3, 2018, at 7:58 PM, Harshad Sahasrabudhe <
> harshad.sahasrabudhe at gmail.com> wrote:
> >
> > Hello,
> >
> > I am solving for the lowest eigenvalues and eigenvectors of symmetric
> positive definite matrices in the generalized eigenvalue problem. I am
> using the GD solver with the default settings of PCBJACOBI. When I run a
> standalone executable on 16 processes which loads the matrices from a file
> and solves the eigenproblem, I get converged results in ~600 iterations. I
> am using PETSc/SLEPc 3.5.4.
> >
> > However, when I use the same settings in my software, which uses LibMesh
> (0.9.5) for FEM discretization, I get a SIGFPE. The backtrace is:
> >
> > Program received signal SIGFPE, Arithmetic exception.
> > 0x00002aaab377ea26 in dvd_improvex_jd_lit_const_0 (d=0x1d29078, i=0,
> theta=0x1f396f8, thetai=0x1f39718, maxits=0x7fffffff816c,
> tol=0x7fffffff8140)
> >     at /depot/ncn/apps/conte/conte-gcc-petsc35-dbg/libs/slepc/
> build-real/src/eps/impls/davidson/common/dvd_improvex.c:1112
> > 1112    if (d->nR[i]/a < data->fix) {
> >
> > #0  0x00002aaab377ea26 in dvd_improvex_jd_lit_const_0 (d=0x1d29078, i=0,
> theta=0x1f396f8, thetai=0x1f39718, maxits=0x7fffffff816c,
> tol=0x7fffffff8140)
> >     at /depot/ncn/apps/conte/conte-gcc-petsc35-dbg/libs/slepc/
> build-real/src/eps/impls/davidson/common/dvd_improvex.c:1112
> > #1  0x00002aaab3774316 in dvd_improvex_jd_gen (d=0x1d29078, r_s=0,
> r_e=1, size_D=0x7fffffff821c) at /depot/ncn/apps/conte/conte-
> gcc-petsc35-dbg/libs/slepc/build-real/src/eps/impls/
> davidson/common/dvd_improvex.c:316
> > #2  0x00002aaab3731ec4 in dvd_updateV_update_gen (d=0x1d29078) at
> /depot/ncn/apps/conte/conte-gcc-petsc35-dbg/libs/slepc/
> build-real/src/eps/impls/davidson/common/dvd_updatev.c:360
> > #3  0x00002aaab3730296 in dvd_updateV_extrapol (d=0x1d29078) at
> /depot/ncn/apps/conte/conte-gcc-petsc35-dbg/libs/slepc/
> build-real/src/eps/impls/davidson/common/dvd_updatev.c:193
> > #4  0x00002aaab3727cbc in EPSSolve_XD (eps=0x1d0ee10) at
> /depot/ncn/apps/conte/conte-gcc-petsc35-dbg/libs/slepc/
> build-real/src/eps/impls/davidson/common/davidson.c:299
> > #5  0x00002aaab35bafc8 in EPSSolve (eps=0x1d0ee10) at
> /depot/ncn/apps/conte/conte-gcc-petsc35-dbg/libs/slepc/
> build-real/src/eps/interface/epssolve.c:99
> > #6  0x00002aaab30dbaf9 in libMesh::SlepcEigenSolver<
> double>::_solve_generalized_helper (this=0x1b19880, mat_A=0x1c906d0,
> mat_B=0x1cb16b0, nev=5, ncv=20, tol=9.9999999999999998e-13, m_its=3000) at
> src/solvers/slepc_eigen_solver.C:519
> > #7  0x00002aaab30da56a in libMesh::SlepcEigenSolver<double>::solve_generalized
> (this=0x1b19880, matrix_A_in=..., matrix_B_in=..., nev=5, ncv=20,
> tol=9.9999999999999998e-13, m_its=3000) at src/solvers/slepc_eigen_
> solver.C:316
> > #8  0x00002aaab30fb02e in libMesh::EigenSystem::solve (this=0x1b19930)
> at src/systems/eigen_system.C:241
> > #9  0x00002aaab30e48a9 in libMesh::CondensedEigenSystem::solve
> (this=0x1b19930) at src/systems/condensed_eigen_system.C:106
> > #10 0x00002aaaacce0e78 in EMSchrodingerFEM::do_solve (this=0x19d6a90) at
> EMSchrodingerFEM.cpp:879
> > #11 0x00002aaaadaae3e5 in Simulation::solve (this=0x19d6a90) at
> Simulation.cpp:789
> > #12 0x00002aaaad52458b in NonlinearPoissonFEM::do_my_assemble
> (this=0x19da050, x=..., residual=0x7fffffff9eb0, jacobian=0x0) at
> NonlinearPoissonFEM.cpp:179
> > #13 0x00002aaaad555eec in NonlinearPoisson::my_assemble_residual
> (x=..., r=..., s=...) at NonlinearPoisson.cpp:1469
> > #14 0x00002aaab30c5dc3 in libMesh::__libmesh_petsc_snes_residual
> (snes=0x1b9ed70, x=0x1a50330, r=0x1a47a50, ctx=0x19e5a60) at
> src/solvers/petsc_nonlinear_solver.C:137
> > #15 0x00002aaab41048b9 in SNESComputeFunction (snes=0x1b9ed70,
> x=0x1a50330, y=0x1a47a50) at /depot/ncn/apps/conte/conte-
> gcc-petsc35-dbg/libs/petsc/build-real/src/snes/interface/snes.c:2033
> > #16 0x00002aaaad1c9ad8 in SNESShellSolve_PredictorCorrector
> (snes=0x1b9ed70, vec_sol=0x1a2a5a0) at PredictorCorrectorModule.cpp:413
> > #17 0x00002aaab4653e3d in SNESSolve_Shell (snes=0x1b9ed70) at
> /depot/ncn/apps/conte/conte-gcc-petsc35-dbg/libs/petsc/
> build-real/src/snes/impls/shell/snesshell.c:167
> > #18 0x00002aaab4116fb7 in SNESSolve (snes=0x1b9ed70, b=0x0, x=0x1a2a5a0)
> at /depot/ncn/apps/conte/conte-gcc-petsc35-dbg/libs/petsc/
> build-real/src/snes/interface/snes.c:3743
> > #19 0x00002aaab30c7c3c in libMesh::PetscNonlinearSolver<double>::solve
> (this=0x19e5a60, jac_in=..., x_in=..., r_in=...) at
> src/solvers/petsc_nonlinear_solver.C:714
> > #20 0x00002aaab3136ad9 in libMesh::NonlinearImplicitSystem::solve
> (this=0x19e4b80) at src/systems/nonlinear_implicit_system.C:183
> > #21 0x00002aaaad5791f3 in NonlinearPoisson::execute_solver
> (this=0x19da050) at NonlinearPoisson.cpp:1218
> > #22 0x00002aaaad554a99 in NonlinearPoisson::do_solve (this=0x19da050) at
> NonlinearPoisson.cpp:961
> > #23 0x00002aaaadaae3e5 in Simulation::solve (this=0x19da050) at
> Simulation.cpp:789
> > #24 0x00002aaaad1c9657 in PredictorCorrectorModule::do_solve
> (this=0x19c0210) at PredictorCorrectorModule.cpp:334
> > #25 0x00002aaaadaae3e5 in Simulation::solve (this=0x19c0210) at
> Simulation.cpp:789
> > #26 0x00002aaaad9e8f4a in Nemo::run_simulations (this=0x63ba80
> <Nemo::instance()::impl>) at Nemo.cpp:1367
> > #27 0x0000000000426f36 in main (argc=2, argv=0x7fffffffd0f8) at
> main.cpp:452
> >
> >
> > Here is the log_view from the standalone executable:
> >
> > ************************************************************
> ************************************************************
> > ***             WIDEN YOUR WINDOW TO 120 CHARACTERS.  Use 'enscript -r
> -fCourier9' to print this document            ***
> > ************************************************************
> ************************************************************
> >
> > ---------------------------------------------- PETSc Performance
> Summary: ----------------------------------------------
> >
> > ./libmesh_solve_eigenproblem on a linux named conte-a373.rcac.purdue.edu
> with 16 processors, by hsahasra Thu May  3 20:56:03 2018
> > Using Petsc Release Version 3.5.4, May, 23, 2015
> >
> >                          Max       Max/Min        Avg      Total
> > Time (sec):           2.628e+01      1.00158   2.625e+01
> > Objects:              6.400e+03      1.00000   6.400e+03
> > Flops:                3.576e+09      1.00908   3.564e+09  5.702e+10
> > Flops/sec:            1.363e+08      1.00907   1.358e+08  2.172e+09
> > MPI Messages:         1.808e+04      2.74920   1.192e+04  1.907e+05
> > MPI Message Lengths:  4.500e+07      1.61013   3.219e+03  6.139e+08
> > MPI Reductions:       8.522e+03      1.00000
> >
> > Flop counting convention: 1 flop = 1 real number operation of type
> (multiply/divide/add/subtract)
> >                             e.g., VecAXPY() for real vectors of length N
> --> 2N flops
> >                             and VecAXPY() for complex vectors of length
> N --> 8N flops
> >
> > Summary of Stages:   ----- Time ------  ----- Flops -----  --- Messages
> ---  -- Message Lengths --  -- Reductions --
> >                         Avg     %Total     Avg     %Total   counts
>  %Total     Avg         %Total   counts   %Total
> >  0:      Main Stage: 2.6254e+01 100.0%  5.7023e+10 100.0%  1.907e+05
> 100.0%  3.219e+03      100.0%  8.521e+03 100.0%
> >
> > ------------------------------------------------------------
> ------------------------------------------------------------
> > See the 'Profiling' chapter of the users' manual for details on
> interpreting output.
> > Phase summary info:
> >    Count: number of times phase was executed
> >    Time and Flops: Max - maximum over all processors
> >                    Ratio - ratio of maximum to minimum over all
> processors
> >    Mess: number of messages sent
> >    Avg. len: average message length (bytes)
> >    Reduct: number of global reductions
> >    Global: entire computation
> >    Stage: stages of a computation. Set stages with PetscLogStagePush()
> and PetscLogStagePop().
> >       %T - percent time in this phase         %F - percent flops in this
> phase
> >       %M - percent messages in this phase     %L - percent message
> lengths in this phase
> >       %R - percent reductions in this phase
> >    Total Mflop/s: 10e-6 * (sum of flops over all processors)/(max time
> over all processors)
> > ------------------------------------------------------------
> ------------------------------------------------------------
> > Event                Count      Time (sec)     Flops
>          --- Global ---  --- Stage ---   Total
> >                    Max Ratio  Max     Ratio   Max  Ratio  Mess   Avg len
> Reduct  %T %F %M %L %R  %T %F %M %L %R Mflop/s
> > ------------------------------------------------------------
> ------------------------------------------------------------
> >
> > --- Event Stage 0: Main Stage
> >
> > MatMult             1639 1.0 4.7509e+00 1.7 3.64e+08 1.1 1.9e+05 3.0e+03
> 0.0e+00 13 10100 93  0  13 10100 93  0  1209
> > MatSolve            1045 1.0 6.4188e-01 1.0 2.16e+08 1.1 0.0e+00 0.0e+00
> 0.0e+00  2  6  0  0  0   2  6  0  0  0  5163
> > MatLUFactorNum         1 1.0 2.0798e-02 3.5 9.18e+05 1.1 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0   664
> > MatILUFactorSym        1 1.0 1.1777e-02 5.9 0.00e+00 0.0 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0     0
> > MatAssemblyBegin       4 1.0 1.3677e-01 6.8 0.00e+00 0.0 0.0e+00 0.0e+00
> 8.0e+00  0  0  0  0  0   0  0  0  0  0     0
> > MatAssemblyEnd         4 1.0 3.7882e-02 1.3 0.00e+00 0.0 4.6e+02 7.5e+02
> 1.6e+01  0  0  0  0  0   0  0  0  0  0     0
> > MatGetRowIJ            1 1.0 7.1526e-06 3.8 0.00e+00 0.0 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0     0
> > MatGetOrdering         1 1.0 2.3198e-04 1.4 0.00e+00 0.0 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0     0
> > MatZeroEntries        33 1.0 1.1992e-04 1.1 0.00e+00 0.0 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0     0
> > MatLoad                2 1.0 2.9271e-01 1.0 0.00e+00 0.0 5.5e+02 7.6e+04
> 2.6e+01  1  0  0  7  0   1  0  0  7  0     0
> > VecCopy             2096 1.0 4.0181e-02 1.1 0.00e+00 0.0 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0     0
> > VecSet              1047 1.0 1.7598e-02 1.1 0.00e+00 0.0 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0     0
> > VecScatterBegin     1639 1.0 4.3395e-01 2.0 0.00e+00 0.0 1.9e+05 3.0e+03
> 0.0e+00  1  0100 93  0   1  0100 93  0     0
> > VecScatterEnd       1639 1.0 3.2399e+00 2.3 0.00e+00 0.0 0.0e+00 0.0e+00
> 0.0e+00  8  0  0  0  0   8  0  0  0  0     0
> > VecReduceArith      2096 1.0 5.6402e-02 1.1 3.27e+07 1.0 0.0e+00 0.0e+00
> 0.0e+00  0  1  0  0  0   0  1  0  0  0  9287
> > VecReduceComm       1572 1.0 5.5213e+00 1.2 0.00e+00 0.0 0.0e+00 0.0e+00
> 1.6e+03 20  0  0  0 18  20  0  0  0 18     0
> > EPSSetUp               1 1.0 9.0121e-02 1.3 0.00e+00 0.0 0.0e+00 0.0e+00
> 5.2e+01  0  0  0  0  1   0  0  0  0  1     0
> > EPSSolve               1 1.0 2.5917e+01 1.0 3.58e+09 1.0 1.9e+05 3.0e+03
> 8.5e+03 99100100 93100  99100100 93100  2200
> > STSetUp                1 1.0 4.8380e-03 5.6 0.00e+00 0.0 0.0e+00 0.0e+00
> 2.0e+00  0  0  0  0  0   0  0  0  0  0     0
> > KSPSetUp               1 1.0 1.1921e-06 0.0 0.00e+00 0.0 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0     0
> > KSPSolve            1045 1.0 6.8107e-01 1.0 2.17e+08 1.1 0.0e+00 0.0e+00
> 0.0e+00  3  6  0  0  0   3  6  0  0  0  4886
> > PCSetUp                2 1.0 2.3827e-02 2.8 9.18e+05 1.1 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0   580
> > PCApply             1045 1.0 7.0819e-01 1.0 2.17e+08 1.1 0.0e+00 0.0e+00
> 0.0e+00  3  6  0  0  0   3  6  0  0  0  4699
> > BVCreate             529 1.0 3.7145e+00 1.6 0.00e+00 0.0 0.0e+00 0.0e+00
> 3.2e+03 11  0  0  0 37  11  0  0  0 37     0
> > BVCopy              1048 1.0 1.3941e-02 1.2 0.00e+00 0.0 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0     0
> > BVMult              3761 1.0 3.6953e+00 1.1 2.00e+09 1.0 0.0e+00 0.0e+00
> 0.0e+00 14 56  0  0  0  14 56  0  0  0  8674
> > BVDot               2675 1.0 9.6611e+00 1.3 1.08e+09 1.0 6.8e+04 3.0e+03
> 2.7e+03 34 30 36 33 31  34 30 36 33 31  1791
> > BVOrthogonalize      526 1.0 4.0705e+00 1.1 7.89e+08 1.0 6.8e+04 3.0e+03
> 5.9e+02 15 22 36 33  7  15 22 36 33  7  3092
> > BVScale             1047 1.0 1.6144e-02 1.1 8.18e+06 1.0 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0  8105
> > BVSetRandom            5 1.0 4.7204e-02 2.0 0.00e+00 0.0 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0     0
> > BVMatProject        1046 1.0 5.1708e+00 1.4 6.11e+08 1.0 0.0e+00 0.0e+00
> 1.6e+03 18 17  0  0 18  18 17  0  0 18  1891
> > DSSolve              533 1.0 9.7243e-01 1.0 0.00e+00 0.0 0.0e+00 0.0e+00
> 0.0e+00  4  0  0  0  0   4  0  0  0  0     0
> > DSVectors           1048 1.0 1.3440e-03 1.4 0.00e+00 0.0 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0     0
> > DSOther             2123 1.0 8.8778e-03 1.1 0.00e+00 0.0 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0     0
> > ------------------------------------------------------------
> ------------------------------------------------------------
> >
> > Memory usage is given in bytes:
> >
> > Object Type          Creations   Destructions     Memory  Descendants'
> Mem.
> > Reports information only for process 0.
> >
> > --- Event Stage 0: Main Stage
> >
> >               Viewer     3              2         1504     0
> >               Matrix  3196           3190     31529868     0
> >               Vector  2653           2651    218802920     0
> >       Vector Scatter     2              0            0     0
> >            Index Set     7              7        84184     0
> > Eigenvalue Problem Solver     1              1         4564     0
> >          PetscRandom     1              1          632     0
> >   Spectral Transform     1              1          828     0
> >        Krylov Solver     2              2         2320     0
> >       Preconditioner     2              2         1912     0
> >        Basis Vectors   530            530      1111328     0
> >               Region     1              1          648     0
> >        Direct solver     1              1       201200     0
> > ============================================================
> ============================================================
> > Average time to get PetscTime(): 9.53674e-08
> > Average time for MPI_Barrier(): 0.0004704
> > Average time for zero size MPI_Send(): 0.000118256
> > #PETSc Option Table entries:
> > -eps_monitor
> > -f1 A.mat
> > -f2 B.mat
> > -log_view
> > -matload_block_size 1
> > -ncv 70
> > -st_ksp_tol 1e-12
> > #End of PETSc Option Table entries
> > Compiled without FORTRAN kernels
> > Compiled with full precision matrices (default)
> > sizeof(short) 2 sizeof(int) 4 sizeof(long) 8 sizeof(void*) 8
> sizeof(PetscScalar) 8 sizeof(PetscInt) 4
> > Configure options: --with-x=0 --download-hdf5=1 --with-scalar-type=real
> --with-single-library=1 --with-pic=1 --with-shared-libraries=0
> --with-clanguage=C++ --with-fortran=1 --with-debugging=0 --with-cc=mpicc
> --with-fc=mpif90 --with-cxx=mpicxx --download-metis=1 --download-parmetis=1
> --with-valgrind-dir=/apps/rhel6/valgrind/3.8.1/ --download-mumps=1
> --with-fortran-kernels=0 --download-superlu_dist=1 --download-scalapack
> --download-fblaslapack=1
> > -----------------------------------------
> > Libraries compiled on Thu Sep 22 10:19:43 2016 on
> carter-g008.rcac.purdue.edu
> > Machine characteristics: Linux-2.6.32-573.8.1.el6.x86_
> 64-x86_64-with-redhat-6.7-Santiago
> > Using PETSc directory: /depot/ncn/apps/conte/conte-
> gcc-petsc35/libs/petsc/build-real
> > Using PETSc arch: linux
> > -----------------------------------------
> >
> > Using C compiler: mpicxx  -Wall -Wwrite-strings -Wno-strict-aliasing
> -Wno-unknown-pragmas -O   -fPIC   ${COPTFLAGS} ${CFLAGS}
> > Using Fortran compiler: mpif90  -fPIC -Wall -Wno-unused-variable
> -ffree-line-length-0 -O   ${FOPTFLAGS} ${FFLAGS}
> > -----------------------------------------
> >
> > Using include paths: -I/depot/ncn/apps/conte/conte-
> gcc-petsc35/libs/petsc/build-real/linux/include
> -I/depot/ncn/apps/conte/conte-gcc-petsc35/libs/petsc/build-real/include
> -I/depot/ncn/apps/conte/conte-gcc-petsc35/libs/petsc/build-real/include
> -I/depot/ncn/apps/conte/conte-gcc-petsc35/libs/petsc/build-real/linux/include
> -I/apps/rhel6/valgrind/3.8.1/include -I/depot/apps/ncn/conte/mpich-
> 3.1/include
> > -----------------------------------------
> >
> > Using C linker: mpicxx
> > Using Fortran linker: mpif90
> > Using libraries: -Wl,-rpath,/depot/ncn/apps/
> conte/conte-gcc-petsc35/libs/petsc/build-real/linux/lib
> -L/depot/ncn/apps/conte/conte-gcc-petsc35/libs/petsc/build-real/linux/lib
> -lpetsc -Wl,-rpath,/depot/ncn/apps/conte/conte-gcc-petsc35/libs/petsc/build-real/linux/lib
> -L/depot/ncn/apps/conte/conte-gcc-petsc35/libs/petsc/build-real/linux/lib
> -lcmumps -ldmumps -lsmumps -lzmumps -lmumps_common -lpord -lscalapack
> -lsuperlu_dist_3.3 -lflapack -lfblas -lparmetis -lmetis -lpthread -lssl
> -lcrypto -lhdf5hl_fortran -lhdf5_fortran -lhdf5_hl -lhdf5 -lz
> -Wl,-rpath,/depot/apps/ncn/conte/mpich-3.1/lib
> -L/depot/apps/ncn/conte/mpich-3.1/lib -Wl,-rpath,/apps/rhel6/gcc/5.
> 2.0/lib/gcc/x86_64-unknown-linux-gnu/5.2.0 -L/apps/rhel6/gcc/5.2.0/lib/
> gcc/x86_64-unknown-linux-gnu/5.2.0 -Wl,-rpath,/apps/rhel6/gcc/5.2.0/lib64
> -L/apps/rhel6/gcc/5.2.0/lib64 -Wl,-rpath,/apps/rhel6/gcc/5.2.0/lib
> -L/apps/rhel6/gcc/5.2.0/lib -lmpichf90 -lgfortran -lm -lgfortran -lm
> -lquadmath -lm -lmpichcxx -lstdc++ -Wl,-rpath,/depot/apps/ncn/conte/mpich-3.1/lib
> -L/depot/apps/ncn/conte/mpich-3.1/lib -Wl,-rpath,/apps/rhel6/gcc/5.
> 2.0/lib/gcc/x86_64-unknown-linux-gnu/5.2.0 -L/apps/rhel6/gcc/5.2.0/lib/
> gcc/x86_64-unknown-linux-gnu/5.2.0 -Wl,-rpath,/apps/rhel6/gcc/5.2.0/lib64
> -L/apps/rhel6/gcc/5.2.0/lib64 -Wl,-rpath,/apps/rhel6/gcc/5.2.0/lib
> -L/apps/rhel6/gcc/5.2.0/lib -ldl -Wl,-rpath,/depot/apps/ncn/conte/mpich-3.1/lib
> -lmpich -lopa -lmpl -lrt -lpthread -lgcc_s -ldl
> > -----------------------------------------
> >
> > Can you please point me to what could be going wrong with the larger
> software?
> >
> > Thanks!
> > Harshad
>
>
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