[petsc-users] Problems running ex12.c
Matthew Knepley
knepley at gmail.com
Mon Mar 3 16:13:58 CST 2014
On Mon, Mar 3, 2014 at 1:44 PM, Miguel Angel Salazar de Troya <
salazardetroya at gmail.com> wrote:
> Thanks. This is what I get.
>
Okay, this was broken by a new push to master/next in the last few days. I
have pushed a fix,
however next is currently broken due to a failure to check in a file. This
should be fixed shortly,
and then ex12 will work. I will mail you when its ready.
Thanks for finding this,
Matt
> (gdb) cont
> Continuing.
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007fd6811bea7b in DMPlexComputeJacobianFEM (dm=0x159a180, X=0x168b5b0,
> Jac=0x7fffae6e8a88, JacP=0x7fffae6e8a88, str=0x7fffae6e7970,
> user=0x7fd6811be509)
> at /home/salaza11/petsc/src/dm/impls/plex/plexfem.c:882
> 882 ierr = PetscFEGetDimension(fe[f], &Nb);CHKERRQ(ierr);
> (gdb) where
> #0 0x00007fd6811bea7b in DMPlexComputeJacobianFEM (dm=0x159a180,
> X=0x168b5b0,
> Jac=0x7fffae6e8a88, JacP=0x7fffae6e8a88, str=0x7fffae6e7970,
> user=0x7fd6811be509)
> at /home/salaza11/petsc/src/dm/impls/plex/plexfem.c:882
> #1 0x00007fd6814a5bf6 in SNESComputeJacobian_DMLocal (snes=0x14e9450,
> X=0x1622ad0, A=0x7fffae6e8a88, B=0x7fffae6e8a88, ctx=0x1652300)
> at /home/salaza11/petsc/src/snes/utils/dmlocalsnes.c:102
> #2 0x00007fd6814cc609 in SNESComputeJacobian (snes=0x14e9450,
> X=0x1622ad0,
> A=0x7fffae6e8a88, B=0x7fffae6e8a88)
> at /home/salaza11/petsc/src/snes/interface/snes.c:2245
> #3 0x000000000040af72 in main (argc=15, argv=0x7fffae6e8bc8)
> at /home/salaza11/petsc/src/snes/examples/tutorials/ex12.c:784
>
>
>
>
> On Mon, Mar 3, 2014 at 1:40 PM, Matthew Knepley <knepley at gmail.com> wrote:
>
>> On Mon, Mar 3, 2014 at 1:39 PM, Miguel Angel Salazar de Troya <
>> salazardetroya at gmail.com> wrote:
>>
>>> This is what I get at gdb when I type 'where'.
>>>
>>
>> You have to type 'cont', and then when it fails you type 'where'.
>>
>> Matt
>>
>>
>>> #0 0x000000310e0aa860 in __nanosleep_nocancel () from /lib64/libc.so.6
>>> #1 0x000000310e0aa70f in sleep () from /lib64/libc.so.6
>>> #2 0x00007fd83a00a8be in PetscSleep (s=10)
>>> at /home/salaza11/petsc/src/sys/utils/psleep.c:52
>>> #3 0x00007fd83a06f331 in PetscAttachDebugger ()
>>> at /home/salaza11/petsc/src/sys/error/adebug.c:397
>>> #4 0x00007fd83a0af1d2 in PetscOptionsCheckInitial_Private ()
>>> at /home/salaza11/petsc/src/sys/objects/init.c:444
>>> #5 0x00007fd83a0b6448 in PetscInitialize (argc=0x7fff5cd8df2c,
>>> args=0x7fff5cd8df20, file=0x0,
>>> help=0x60ce40 "Poisson Problem in 2d and 3d with simplicial finite
>>> elements.\nWe solve the Poisson problem in a rectangular\ndomain, using a
>>> parallel unstructured mesh (DMPLEX) to discretize it.\n\n\n")
>>> at /home/salaza11/petsc/src/sys/objects/pinit.c:876
>>> #6 0x0000000000408f2c in main (argc=15, argv=0x7fff5cd8f1f8)
>>> at /home/salaza11/petsc/src/snes/examples/tutorials/ex12.c:663
>>>
>>> The rest of the gdb output is attached. I am a bit ignorant with gdb, I
>>> apologize for that.
>>>
>>>
>>>
>>> On Mon, Mar 3, 2014 at 12:48 PM, Matthew Knepley <knepley at gmail.com>wrote:
>>>
>>>> On Mon, Mar 3, 2014 at 12:39 PM, Miguel Angel Salazar de Troya <
>>>> salazardetroya at gmail.com> wrote:
>>>>
>>>>> Thanks for your response. Sorry I did not have the "next" version, but
>>>>> the "master" version. I still have an error though. I followed the steps
>>>>> given here (https://bitbucket.org/petsc/petsc/wiki/Home) to obtain
>>>>> the next version, I configured petsc as above and ran ex12 as above as
>>>>> well, getting this error:
>>>>>
>>>>> [salaza11 at maya tutorials]$ ./ex12 -run_type test -refinement_limit
>>>>> 0.0 -bc_type dirichlet -interpolate 0 -petscspace_order 1 -show_initial
>>>>> -dm_plex_print_fem 1
>>>>> Local function:
>>>>> Vec Object: 1 MPI processes
>>>>> type: seq
>>>>> 0
>>>>> 0.25
>>>>> 1
>>>>> 0.25
>>>>> 0.5
>>>>> 1.25
>>>>> 1
>>>>> 1.25
>>>>> 2
>>>>> Initial guess
>>>>> Vec Object: 1 MPI processes
>>>>> type: seq
>>>>> 0.5
>>>>> L_2 Error: 0.111111
>>>>> Residual:
>>>>> Vec Object: 1 MPI processes
>>>>> type: seq
>>>>> 0
>>>>> 0
>>>>> 0
>>>>> 0
>>>>> 0
>>>>> 0
>>>>> 0
>>>>> 0
>>>>> 0
>>>>> Initial Residual
>>>>> Vec Object: 1 MPI processes
>>>>> type: seq
>>>>> 0
>>>>> L_2 Residual: 0
>>>>>
>>>>
>>>> Okay, now run with -start_in_debugger, and give me a stack trace using
>>>> 'where'.
>>>>
>>>> Thanks,
>>>>
>>>> Matt
>>>>
>>>>
>>>>> [0]PETSC ERROR:
>>>>> ------------------------------------------------------------------------
>>>>> [0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation,
>>>>> probably memory access out of range
>>>>> [0]PETSC ERROR: Try option -start_in_debugger or
>>>>> -on_error_attach_debugger
>>>>> [0]PETSC ERROR: or see
>>>>> http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind[0]PETSCERROR: or try
>>>>> http://valgrind.org on GNU/linux and Apple Mac OS X to find memory
>>>>> corruption errors
>>>>> [0]PETSC ERROR: likely location of problem given in stack below
>>>>> [0]PETSC ERROR: --------------------- Stack Frames
>>>>> ------------------------------------
>>>>> [0]PETSC ERROR: Note: The EXACT line numbers in the stack are not
>>>>> available,
>>>>> [0]PETSC ERROR: INSTEAD the line number of the start of the
>>>>> function
>>>>> [0]PETSC ERROR: is given.
>>>>> [0]PETSC ERROR: [0] DMPlexComputeJacobianFEM line 871
>>>>> /home/salaza11/petsc/src/dm/impls/plex/plexfem.c
>>>>> [0]PETSC ERROR: [0] SNESComputeJacobian_DMLocal line 94
>>>>> /home/salaza11/petsc/src/snes/utils/dmlocalsnes.c
>>>>> [0]PETSC ERROR: [0] SNES user Jacobian function line 2244
>>>>> /home/salaza11/petsc/src/snes/interface/snes.c
>>>>> [0]PETSC ERROR: [0] SNESComputeJacobian line 2203
>>>>> /home/salaza11/petsc/src/snes/interface/snes.c
>>>>> [0]PETSC ERROR: --------------------- Error Message
>>>>> --------------------------------------------------------------
>>>>> [0]PETSC ERROR: Signal received
>>>>> [0]PETSC ERROR: See http://
>>>>> http://www.mcs.anl.gov/petsc/documentation/faq.html for trouble
>>>>> shooting.
>>>>> [0]PETSC ERROR: Petsc Development GIT revision: v3.4.3-4705-gfb6b3bc
>>>>> GIT Date: 2014-03-03 08:23:43 -0600
>>>>> [0]PETSC ERROR: ./ex12 on a linux-gnu-c-debug named maya by salaza11
>>>>> Mon Mar 3 11:49:15 2014
>>>>> [0]PETSC ERROR: Configure options --download-mpich
>>>>> --download-scientificpython --download-triangle --download-ctetgen
>>>>> --download-chaco --with-c2html=0
>>>>> [0]PETSC ERROR: #1 User provided function() line 0 in unknown file
>>>>> application called MPI_Abort(MPI_COMM_WORLD, 59) - process 0
>>>>> [unset]: aborting job:
>>>>> application called MPI_Abort(MPI_COMM_WORLD, 59) - process 0
>>>>>
>>>>>
>>>>>
>>>>> On Sun, Mar 2, 2014 at 7:11 PM, Matthew Knepley <knepley at gmail.com>wrote:
>>>>>
>>>>>> On Sun, Mar 2, 2014 at 6:54 PM, Miguel Angel Salazar de Troya <
>>>>>> salazardetroya at gmail.com> wrote:
>>>>>>
>>>>>>> Hi everybody
>>>>>>>
>>>>>>> I am trying to run example ex12.c without much success. I
>>>>>>> specifically run it with the command options:
>>>>>>>
>>>>>>
>>>>>> We need to start narrowing down differences, because it runs for me
>>>>>> and our nightly tests. So, first can
>>>>>> you confirm that you are using the latest 'next' branch?
>>>>>>
>>>>>> Thanks,
>>>>>>
>>>>>> Matt
>>>>>>
>>>>>>
>>>>>>> ./ex12 -run_type test -refinement_limit 0.0 -bc_type dirichlet
>>>>>>> -interpolate 0 -petscspace_order 1 -show_initial -dm_plex_print_fem 1
>>>>>>>
>>>>>>> And I get this output
>>>>>>>
>>>>>>> Local function:
>>>>>>> Vec Object: 1 MPI processes
>>>>>>> type: seq
>>>>>>> 0
>>>>>>> 1
>>>>>>> 1
>>>>>>> 2
>>>>>>> 1
>>>>>>> 2
>>>>>>> 2
>>>>>>> 3
>>>>>>> Initial guess
>>>>>>> Vec Object: 1 MPI processes
>>>>>>> type: seq
>>>>>>> L_2 Error: 0.625
>>>>>>> Residual:
>>>>>>> Vec Object: 1 MPI processes
>>>>>>> type: seq
>>>>>>> 0
>>>>>>> 0
>>>>>>> 0
>>>>>>> 0
>>>>>>> 0
>>>>>>> 0
>>>>>>> 0
>>>>>>> 0
>>>>>>> Initial Residual
>>>>>>> Vec Object: 1 MPI processes
>>>>>>> type: seq
>>>>>>> L_2 Residual: 0
>>>>>>> [0]PETSC ERROR:
>>>>>>> ------------------------------------------------------------------------
>>>>>>> [0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation
>>>>>>> Violation, probably memory access out of range
>>>>>>> [0]PETSC ERROR: Try option -start_in_debugger or
>>>>>>> -on_error_attach_debugger
>>>>>>> [0]PETSC ERROR: or see
>>>>>>> http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind[0]PETSCERROR: or try
>>>>>>> http://valgrind.org on GNU/linux and Apple Mac OS X to find memory
>>>>>>> corruption errors
>>>>>>> [0]PETSC ERROR: likely location of problem given in stack below
>>>>>>> [0]PETSC ERROR: --------------------- Stack Frames
>>>>>>> ------------------------------------
>>>>>>> [0]PETSC ERROR: Note: The EXACT line numbers in the stack are not
>>>>>>> available,
>>>>>>> [0]PETSC ERROR: INSTEAD the line number of the start of the
>>>>>>> function
>>>>>>> [0]PETSC ERROR: is given.
>>>>>>> [0]PETSC ERROR: [0] DMPlexComputeJacobianFEM line 867
>>>>>>> /home/salaza11/petsc/src/dm/impls/plex/plexfem.c
>>>>>>> [0]PETSC ERROR: [0] SNESComputeJacobian_DMLocal line 94
>>>>>>> /home/salaza11/petsc/src/snes/utils/dmlocalsnes.c
>>>>>>> [0]PETSC ERROR: [0] SNES user Jacobian function line 2244
>>>>>>> /home/salaza11/petsc/src/snes/interface/snes.c
>>>>>>> [0]PETSC ERROR: [0] SNESComputeJacobian line 2203
>>>>>>> /home/salaza11/petsc/src/snes/interface/snes.c
>>>>>>> [0]PETSC ERROR: --------------------- Error Message
>>>>>>> ------------------------------------
>>>>>>> [0]PETSC ERROR: Signal received!
>>>>>>> [0]PETSC ERROR:
>>>>>>> ------------------------------------------------------------------------
>>>>>>> [0]PETSC ERROR: Petsc Development GIT revision: v3.4.3-3453-g0a94005
>>>>>>> GIT Date: 2014-03-02 13:12:04 -0600
>>>>>>> [0]PETSC ERROR: See docs/changes/index.html for recent updates.
>>>>>>> [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
>>>>>>> [0]PETSC ERROR: See docs/index.html for manual pages.
>>>>>>> [0]PETSC ERROR:
>>>>>>> ------------------------------------------------------------------------
>>>>>>> [0]PETSC ERROR: ./ex12 on a linux-gnu-c-debug named maya by salaza11
>>>>>>> Sun Mar 2 17:00:09 2014
>>>>>>> [0]PETSC ERROR: Libraries linked from
>>>>>>> /home/salaza11/petsc/linux-gnu-c-debug/lib
>>>>>>> [0]PETSC ERROR: Configure run at Sun Mar 2 16:46:51 2014
>>>>>>> [0]PETSC ERROR: Configure options --download-mpich
>>>>>>> --download-scientificpython --download-triangle --download-ctetgen
>>>>>>> --download-chaco --with-c2html=0
>>>>>>> [0]PETSC ERROR:
>>>>>>> ------------------------------------------------------------------------
>>>>>>> [0]PETSC ERROR: User provided function() line 0 in unknown file
>>>>>>> application called MPI_Abort(MPI_COMM_WORLD, 59) - process 0
>>>>>>> [unset]: aborting job:
>>>>>>> application called MPI_Abort(MPI_COMM_WORLD, 59) - process 0
>>>>>>>
>>>>>>>
>>>>>>> Probably my problems could be on my configuration. I attach the
>>>>>>> configure.log. I ran ./configure like this
>>>>>>>
>>>>>>> ./configure --download-mpich --download-scientificpython
>>>>>>> --download-triangle --download-ctetgen --download-chaco --with-c2html=0
>>>>>>>
>>>>>>> Thanks a lot in advance.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Tue, Jan 28, 2014 at 10:37 AM, Matthew Knepley <knepley at gmail.com
>>>>>>> > wrote:
>>>>>>>
>>>>>>>> On Tue, Jan 28, 2014 at 10:31 AM, Yaakoub El Khamra <
>>>>>>>> yelkhamra at gmail.com> wrote:
>>>>>>>>
>>>>>>>>>
>>>>>>>>> If
>>>>>>>>> ./ex12 -run_type test -dim 3 -refinement_limit 0.0125
>>>>>>>>> -variable_coefficient field -interpolate 1 -petscspace_order 2
>>>>>>>>> -show_initial -dm_plex_print_fem
>>>>>>>>>
>>>>>>>>> is for serial, any chance we can get the options to run in
>>>>>>>>> parallel?
>>>>>>>>>
>>>>>>>>
>>>>>>>> Just use mpiexec -n <procs>
>>>>>>>>
>>>>>>>> Matt
>>>>>>>>
>>>>>>>>
>>>>>>>>>
>>>>>>>>> Regards
>>>>>>>>> Yaakoub El Khamra
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Fri, Jan 17, 2014 at 11:29 AM, Matthew Knepley <
>>>>>>>>> knepley at gmail.com> wrote:
>>>>>>>>>
>>>>>>>>>> On Fri, Jan 17, 2014 at 11:06 AM, Jones,Martin Alexander <
>>>>>>>>>> MAJones2 at mdanderson.org> wrote:
>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> ------------------------------
>>>>>>>>>>> *From:* Matthew Knepley [knepley at gmail.com]
>>>>>>>>>>> *Sent:* Friday, January 17, 2014 11:04 AM
>>>>>>>>>>> *To:* Jones,Martin Alexander
>>>>>>>>>>> *Cc:* petsc-users at mcs.anl.gov
>>>>>>>>>>> *Subject:* Re: [petsc-users] Problems running ex12.c
>>>>>>>>>>>
>>>>>>>>>>> On Fri, Jan 17, 2014 at 11:00 AM, Jones,Martin Alexander <
>>>>>>>>>>> MAJones2 at mdanderson.org> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> These examples all seem to run excepting the following
>>>>>>>>>>>> command,
>>>>>>>>>>>>
>>>>>>>>>>>> ex12 -run_type test -dim 3 -refinement_limit 0.0125
>>>>>>>>>>>> -variable_coefficient field -interpolate 1 -petscspace_order 2
>>>>>>>>>>>> -show_initial -dm_plex_print_fem
>>>>>>>>>>>>
>>>>>>>>>>>> I get the following ouput:
>>>>>>>>>>>>
>>>>>>>>>>>> ./ex12 -run_type test -dim 3 -refinement_limit 0.0125
>>>>>>>>>>>> -variable_coefficient field -interpolate 1 -petscspace_order 2
>>>>>>>>>>>> -show_initial -dm_plex_print_fem
>>>>>>>>>>>> Local function:
>>>>>>>>>>>> ./ex12: symbol lookup error:
>>>>>>>>>>>> /opt/apps/EPD/epd-7.3-1-rh5-x86_64/lib/libmkl_intel_thread.so: undefined
>>>>>>>>>>>> symbol: omp_get_num_procs
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> This is a build problem, but it should affect all the runs. Is
>>>>>>>>>>> this reproducible? Can you send configure.log? MKL is the worst. If this
>>>>>>>>>>> persists, I would just switch to --download-f-blas-lapack.
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Thanks. I have some advice on options
>>>>>>>>>>
>>>>>>>>>> --with-precision=single # I would not use this unless you are
>>>>>>>>>> doing something special, like CUDA
>>>>>>>>>> --with-clanguage=C++ # I would recommend switching to C, the
>>>>>>>>>> build is much faster
>>>>>>>>>> --with-mpi-dir=/usr --with-mpi4py=0
>>>>>>>>>> --with-shared-libraries --CFLAGS=-O0 --CXXFLAGS=-O0 --with-fc=0
>>>>>>>>>> --with-etags=1 # This is unnecessary
>>>>>>>>>>
>>>>>>>>>> --with-blas-lapack-lib="[/opt/apps/EPD/epd-7.3-1-rh5-x86_64/lib/libmkl_rt.so,/opt/apps/EPD/epd-7.3-1-rh5-x86_64/lib/libmkl_intel_thread.so,/opt/apps/EPD/epd-7.3-1-rh5-x86_64/lib/libmkl_core.so,/opt/apps/EPD/epd-7.3-1-rh5-x86_64/lib/libiomp5.so]"
>>>>>>>>>> # Here is the problem, see below
>>>>>>>>>> --download-metis
>>>>>>>>>> --download-fiat=yes --download-generator
>>>>>>>>>> --download-scientificpython # Get rid of these, they are obsolete
>>>>>>>>>>
>>>>>>>>>> Your MKL needs another library for the OpenMP symbols. I would
>>>>>>>>>> recommend switching to --download-f2cblaslapack,
>>>>>>>>>> or you can try and find that library.
>>>>>>>>>>
>>>>>>>>>> Thanks,
>>>>>>>>>>
>>>>>>>>>> Matt
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>> Thanks,
>>>>>>>>>>>
>>>>>>>>>>> Matt
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>> ------------------------------
>>>>>>>>>>>> *From:* Matthew Knepley [knepley at gmail.com]
>>>>>>>>>>>> *Sent:* Thursday, January 16, 2014 6:35 PM
>>>>>>>>>>>> *To:* Jones,Martin Alexander
>>>>>>>>>>>> *Cc:* petsc-users at mcs.anl.gov
>>>>>>>>>>>> *Subject:* Re: [petsc-users] Problems running ex12.c
>>>>>>>>>>>>
>>>>>>>>>>>> On Thu, Jan 16, 2014 at 5:43 PM, Jones,Martin Alexander <
>>>>>>>>>>>> MAJones2 at mdanderson.org> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> Hi, This is the next error message after configuring and
>>>>>>>>>>>>> building with the triangle package when trying to run ex12
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> This is my fault for bad defaults. I will fix. Try running
>>>>>>>>>>>>
>>>>>>>>>>>> ./ex12 -run_type test -refinement_limit 0.0 -bc_type
>>>>>>>>>>>> dirichlet -interpolate 0 -petscspace_order 1 -show_initial
>>>>>>>>>>>> -dm_plex_print_fem 1
>>>>>>>>>>>>
>>>>>>>>>>>> for a representative run. Then you could try 3D
>>>>>>>>>>>>
>>>>>>>>>>>> ex12 -run_type test -dim 3 -refinement_limit 0.0125
>>>>>>>>>>>> -variable_coefficient field -interpolate 1 -petscspace_order 2
>>>>>>>>>>>> -show_initial -dm_plex_print_fem
>>>>>>>>>>>>
>>>>>>>>>>>> or a full run
>>>>>>>>>>>>
>>>>>>>>>>>> ex12 -refinement_limit 0.01 -bc_type dirichlet -interpolate
>>>>>>>>>>>> -petscspace_order 1
>>>>>>>>>>>>
>>>>>>>>>>>> ex12 -refinement_limit 0.01 -bc_type dirichlet -interpolate
>>>>>>>>>>>> -petscspace_order 2
>>>>>>>>>>>>
>>>>>>>>>>>> Let me know if those work.
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>
>>>>>>>>>>>> Matt
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>> ./ex12
>>>>>>>>>>>>> [0]PETSC ERROR:
>>>>>>>>>>>>> ------------------------------------------------------------------------
>>>>>>>>>>>>> [0]PETSC ERROR: Caught signal number 8 FPE: Floating Point
>>>>>>>>>>>>> Exception,probably divide by zero
>>>>>>>>>>>>> [0]PETSC ERROR: Try option -start_in_debugger or
>>>>>>>>>>>>> -on_error_attach_debugger
>>>>>>>>>>>>> [0]PETSC ERROR: or see
>>>>>>>>>>>>> http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind[0]PETSCERROR: or try
>>>>>>>>>>>>> http://valgrind.org on GNU/linux and Apple Mac OS X to find
>>>>>>>>>>>>> memory corruption errors
>>>>>>>>>>>>> [0]PETSC ERROR: likely location of problem given in stack below
>>>>>>>>>>>>> [0]PETSC ERROR: --------------------- Stack Frames
>>>>>>>>>>>>> ------------------------------------
>>>>>>>>>>>>> [0]PETSC ERROR: Note: The EXACT line numbers in the stack are
>>>>>>>>>>>>> not available,
>>>>>>>>>>>>> [0]PETSC ERROR: INSTEAD the line number of the start of
>>>>>>>>>>>>> the function
>>>>>>>>>>>>> [0]PETSC ERROR: is given.
>>>>>>>>>>>>> [0]PETSC ERROR: [0] DMPlexComputeResidualFEM line 531
>>>>>>>>>>>>> /home/mjonesa/PETSc/petsc/src/dm/impls/plex/plexfem.c
>>>>>>>>>>>>> [0]PETSC ERROR: [0] SNESComputeFunction_DMLocal line 63
>>>>>>>>>>>>> /home/mjonesa/PETSc/petsc/src/snes/utils/dmlocalsnes.c
>>>>>>>>>>>>> [0]PETSC ERROR: [0] SNES user function line 2088
>>>>>>>>>>>>> /home/mjonesa/PETSc/petsc/src/snes/interface/snes.c
>>>>>>>>>>>>> [0]PETSC ERROR: [0] SNESComputeFunction line 2076
>>>>>>>>>>>>> /home/mjonesa/PETSc/petsc/src/snes/interface/snes.c
>>>>>>>>>>>>> [0]PETSC ERROR: [0] SNESSolve_NEWTONLS line 144
>>>>>>>>>>>>> /home/mjonesa/PETSc/petsc/src/snes/impls/ls/ls.c
>>>>>>>>>>>>> [0]PETSC ERROR: [0] SNESSolve line 3765
>>>>>>>>>>>>> /home/mjonesa/PETSc/petsc/src/snes/interface/snes.c
>>>>>>>>>>>>> [0]PETSC ERROR: --------------------- Error Message
>>>>>>>>>>>>> ------------------------------------
>>>>>>>>>>>>> [0]PETSC ERROR: Signal received!
>>>>>>>>>>>>> [0]PETSC ERROR:
>>>>>>>>>>>>> ------------------------------------------------------------------------
>>>>>>>>>>>>> [0]PETSC ERROR: Petsc Development GIT revision:
>>>>>>>>>>>>> v3.4.3-2317-gcd0e7f7 GIT Date: 2014-01-15 20:33:42 -0600
>>>>>>>>>>>>> [0]PETSC ERROR: See docs/changes/index.html for recent updates.
>>>>>>>>>>>>> [0]PETSC ERROR: See docs/faq.html for hints about trouble
>>>>>>>>>>>>> shooting.
>>>>>>>>>>>>> [0]PETSC ERROR: See docs/index.html for manual pages.
>>>>>>>>>>>>> [0]PETSC ERROR:
>>>>>>>>>>>>> ------------------------------------------------------------------------
>>>>>>>>>>>>> [0]PETSC ERROR: ./ex12 on a arch-linux2-cxx-debug named maeda
>>>>>>>>>>>>> by mjonesa Thu Jan 16 17:41:23 2014
>>>>>>>>>>>>> [0]PETSC ERROR: Libraries linked from /home/mjonesa/local/lib
>>>>>>>>>>>>> [0]PETSC ERROR: Configure run at Thu Jan 16 17:38:33 2014
>>>>>>>>>>>>> [0]PETSC ERROR: Configure options --prefix=/home/mjonesa/local
>>>>>>>>>>>>> --with-blas-lapack-lib="[/opt/apps/EPD/epd-7.3-1-rh5-x86_64/lib/libmkl_rt.so,/opt/apps/EPD/epd-7.3-1-rh5-x86_64/lib/libmkl_intel_thread.so,/opt/apps/EPD/epd-7.3-1-rh5-x86_64/lib/libmkl_core.so,/opt/apps/EPD/epd-7.3-1-rh5-x86_64/lib/libiomp5.so]"
>>>>>>>>>>>>> --with-c2html=0 --with-clanguage=c++ PETSC_ARCH=arch-linux2-cxx-debug
>>>>>>>>>>>>> --download-triangle
>>>>>>>>>>>>> [0]PETSC ERROR:
>>>>>>>>>>>>> ------------------------------------------------------------------------
>>>>>>>>>>>>> [0]PETSC ERROR: User provided function() line 0 in unknown
>>>>>>>>>>>>> file
>>>>>>>>>>>>> application called MPI_Abort(MPI_COMM_WORLD, 59) - process 0
>>>>>>>>>>>>> ------------------------------
>>>>>>>>>>>>> *From:* Matthew Knepley [knepley at gmail.com]
>>>>>>>>>>>>> *Sent:* Thursday, January 16, 2014 4:37 PM
>>>>>>>>>>>>> *To:* Jones,Martin Alexander
>>>>>>>>>>>>> *Cc:* petsc-users at mcs.anl.gov
>>>>>>>>>>>>> *Subject:* Re: [petsc-users] Problems running ex12.c
>>>>>>>>>>>>>
>>>>>>>>>>>>> On Thu, Jan 16, 2014 at 4:33 PM, Jones,Martin Alexander <
>>>>>>>>>>>>> MAJones2 at mdanderson.org> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> Hi, I have downloaded and built the dev version you
>>>>>>>>>>>>>> suggested. I think I need the triangle package to run this particular case.
>>>>>>>>>>>>>> Is there any thing else that appears wrong in what I have done from the
>>>>>>>>>>>>>> error messages below:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> Great! Its running. You can reconfigure like this:
>>>>>>>>>>>>>
>>>>>>>>>>>>> $PETSC_DIR/$PETSC_ARCH/conf/reconfigure-$PETSC_ARCH.py
>>>>>>>>>>>>> --download-triangle
>>>>>>>>>>>>>
>>>>>>>>>>>>> and then rebuild
>>>>>>>>>>>>>
>>>>>>>>>>>>> make
>>>>>>>>>>>>>
>>>>>>>>>>>>> and then rerun. You can load meshes, but its much easier to
>>>>>>>>>>>>> have triangle create them.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks for being patient,
>>>>>>>>>>>>>
>>>>>>>>>>>>> Matt
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>> [0]PETSC ERROR: --------------------- Error Message
>>>>>>>>>>>>>> ------------------------------------
>>>>>>>>>>>>>> [0]PETSC ERROR: No support for this operation for this object
>>>>>>>>>>>>>> type!
>>>>>>>>>>>>>> [0]PETSC ERROR: Mesh generation needs external package
>>>>>>>>>>>>>> support.
>>>>>>>>>>>>>> Please reconfigure with --download-triangle.!
>>>>>>>>>>>>>> [0]PETSC ERROR:
>>>>>>>>>>>>>> ------------------------------------------------------------------------
>>>>>>>>>>>>>> [0]PETSC ERROR: Petsc Development GIT revision:
>>>>>>>>>>>>>> v3.4.3-2317-gcd0e7f7 GIT Date: 2014-01-15 20:33:42 -0600
>>>>>>>>>>>>>> [0]PETSC ERROR: See docs/changes/index.html for recent
>>>>>>>>>>>>>> updates.
>>>>>>>>>>>>>> [0]PETSC ERROR: See docs/faq.html for hints about trouble
>>>>>>>>>>>>>> shooting.
>>>>>>>>>>>>>> [0]PETSC ERROR: See docs/index.html for manual pages.
>>>>>>>>>>>>>> [0]PETSC ERROR:
>>>>>>>>>>>>>> ------------------------------------------------------------------------
>>>>>>>>>>>>>> [0]PETSC ERROR: ./ex12 on a arch-linux2-cxx-debug named maeda
>>>>>>>>>>>>>> by mjonesa Thu Jan 16 16:28:20 2014
>>>>>>>>>>>>>> [0]PETSC ERROR: Libraries linked from /home/mjonesa/local/lib
>>>>>>>>>>>>>> [0]PETSC ERROR: Configure run at Thu Jan 16 16:25:53 2014
>>>>>>>>>>>>>> [0]PETSC ERROR: Configure options
>>>>>>>>>>>>>> --prefix=/home/mjonesa/local --with-clanguage=c++ --with-c2html=0
>>>>>>>>>>>>>> --with-blas-lapack-lib="[/opt/apps/EPD/epd-7.3-1-rh5-x86_64/lib/libmkl_rt.so,/opt/apps/EPD/epd-7.3-1-rh5-x86_64/lib/libmkl_intel_thread.so,/opt/apps/EPD/epd-7.3-1-rh5-x86_64/lib/libmkl_core.so,/opt/apps/EPD/epd-7.3-1-rh5-x86_64/lib/libiomp5.so]"
>>>>>>>>>>>>>> [0]PETSC ERROR:
>>>>>>>>>>>>>> ------------------------------------------------------------------------
>>>>>>>>>>>>>> [0]PETSC ERROR: DMPlexGenerate() line 4332 in
>>>>>>>>>>>>>> /home/mjonesa/PETSc/petsc/src/dm/impls/plex/plex.c
>>>>>>>>>>>>>> [0]PETSC ERROR: DMPlexCreateBoxMesh() line 600 in
>>>>>>>>>>>>>> /home/mjonesa/PETSc/petsc/src/dm/impls/plex/plexcreate.c
>>>>>>>>>>>>>> [0]PETSC ERROR: CreateMesh() line 295 in
>>>>>>>>>>>>>> /home/mjonesa/PETSc/petsc/src/snes/examples/tutorials/ex12.c
>>>>>>>>>>>>>> [0]PETSC ERROR: main() line 659 in
>>>>>>>>>>>>>> /home/mjonesa/PETSc/petsc/src/snes/examples/tutorials/ex12.c
>>>>>>>>>>>>>> application called MPI_Abort(MPI_COMM_WORLD, 56) - process 0
>>>>>>>>>>>>>> ------------------------------
>>>>>>>>>>>>>> *From:* Matthew Knepley [knepley at gmail.com]
>>>>>>>>>>>>>> *Sent:* Thursday, January 16, 2014 4:06 PM
>>>>>>>>>>>>>> *To:* Jones,Martin Alexander
>>>>>>>>>>>>>> *Cc:* petsc-users at mcs.anl.gov
>>>>>>>>>>>>>> *Subject:* Re: [petsc-users] Problems running ex12.c
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> On Thu, Jan 16, 2014 at 4:05 PM, Jones,Martin Alexander <
>>>>>>>>>>>>>> MAJones2 at mdanderson.org> wrote:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Hi. I changed the ENV variable to the correct entry. when
>>>>>>>>>>>>>>> I type make ex12 I get this:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> mjonesa at maeda:~/PETSc/petsc-3.4.3/src/snes/examples/tutorials$
>>>>>>>>>>>>>>> make ex12
>>>>>>>>>>>>>>> g++ -o ex12.o -c -Wall -Wwrite-strings -Wno-strict-aliasing
>>>>>>>>>>>>>>> -Wno-unknown-pragmas -g -fPIC
>>>>>>>>>>>>>>> -I/home/mjonesa/PETSc/petsc-3.4.3/include
>>>>>>>>>>>>>>> -I/home/mjonesa/PETSc/petsc-3.4.3/arch-linux2-cxx-debug/include
>>>>>>>>>>>>>>> -I/home/mjonesa/PETSc/petsc-3.4.3/include/mpiuni
>>>>>>>>>>>>>>> -D__INSDIR__=src/snes/examples/tutorials/ ex12.c
>>>>>>>>>>>>>>> ex12.c:14:18: fatal error: ex12.h: No such file or directory
>>>>>>>>>>>>>>> compilation terminated.
>>>>>>>>>>>>>>> make: *** [ex12.o] Error 1
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Any help of yours is very much appreciated.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Yes, this relates to my 3). This is not going to work for
>>>>>>>>>>>>>> you with the release. Please see the link I sent.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Matt
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> ------------------------------
>>>>>>>>>>>>>>> *From:* Matthew Knepley [knepley at gmail.com]
>>>>>>>>>>>>>>> *Sent:* Thursday, January 16, 2014 3:58 PM
>>>>>>>>>>>>>>> *To:* Jones,Martin Alexander
>>>>>>>>>>>>>>> *Cc:* petsc-users at mcs.anl.gov
>>>>>>>>>>>>>>> *Subject:* Re: [petsc-users] Problems running ex12.c
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On Thu, Jan 16, 2014 at 3:55 PM, Jones,Martin Alexander <
>>>>>>>>>>>>>>> MAJones2 at mdanderson.org> wrote:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks!
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> You built with PETSC_ARCH=arch-linux2-cxx-debug
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Matt
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> ------------------------------
>>>>>>>>>>>>>>>> *From:* Matthew Knepley [knepley at gmail.com]
>>>>>>>>>>>>>>>> *Sent:* Thursday, January 16, 2014 3:31 PM
>>>>>>>>>>>>>>>> *To:* Jones,Martin Alexander
>>>>>>>>>>>>>>>> *Cc:* petsc-users at mcs.anl.gov
>>>>>>>>>>>>>>>> *Subject:* Re: [petsc-users] Problems running ex12.c
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> On Thu, Jan 16, 2014 at 3:11 PM, Jones,Martin Alexander
>>>>>>>>>>>>>>>> <MAJones2 at mdanderson.org> wrote:
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Now I went to the directory where ex12.c sits and just
>>>>>>>>>>>>>>>>> did a 'make ex12.c' with the following error if this helps? :
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> mjonesa at maeda:~/PETSc/petsc-3.4.3/src/snes/examples/tutorials$
>>>>>>>>>>>>>>>>> make ex12.c
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> /home/mjonesa/PETSc/petsc-3.4.3/conf/variables:108:
>>>>>>>>>>>>>>>>> /home/mjonesa/PETSc/petsc-3.4.3/linux-gnu-cxx-debug/conf/petscvariables: No
>>>>>>>>>>>>>>>>> such file or directory
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> /home/mjonesa/PETSc/petsc-3.4.3/conf/rules:962:
>>>>>>>>>>>>>>>>> /home/mjonesa/PETSc/petsc-3.4.3/linux-gnu-cxx-debug/conf/petscrules: No
>>>>>>>>>>>>>>>>> such file or directory
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> make: *** No rule to make target
>>>>>>>>>>>>>>>>> `/home/mjonesa/PETSc/petsc-3.4.3/linux-gnu-cxx-debug/conf/petscrules'.
>>>>>>>>>>>>>>>>> Stop.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> 1) You would type 'make ex12'
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> 2) Either you PETSC_DIR (/home/mjonesa/PETSc/petsc-3.4.3)
>>>>>>>>>>>>>>>> or PETSC_ARCH (linux-gnu-cxx-debug) environment variables
>>>>>>>>>>>>>>>> do not match what you built. Please send configure.log
>>>>>>>>>>>>>>>> and make.log
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> 3) Since it was only recently added, if you want to use
>>>>>>>>>>>>>>>> the FEM functionality, you must use the development version:
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> http://www.mcs.anl.gov/petsc/developers/index.html
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Matt
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> *From:* Matthew Knepley [mailto:knepley at gmail.com]
>>>>>>>>>>>>>>>>> *Sent:* Thursday, January 16, 2014 2:48 PM
>>>>>>>>>>>>>>>>> *To:* Jones,Martin Alexander
>>>>>>>>>>>>>>>>> *Cc:* petsc-users at mcs.anl.gov
>>>>>>>>>>>>>>>>> *Subject:* Re: [petsc-users] Problems running ex12.c
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> On Thu, Jan 16, 2014 at 2:35 PM, Jones,Martin Alexander <
>>>>>>>>>>>>>>>>> MAJones2 at mdanderson.org> wrote:
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Hello To Whom it Concerns,
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> I am trying to run the tutorial ex12.c by running 'bin/pythonscripts/PetscGenerateFEMQuadrature.py
>>>>>>>>>>>>>>>>> dim order dim 1 laplacian dim order dim 1 boundary
>>>>>>>>>>>>>>>>> src/snes/examples/tutorials/ex12.h'
>>>>>>>>>>>>>>>>> but getting the following error:
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> $ bin/pythonscripts/PetscGenerateFEMQuadrature.py dim
>>>>>>>>>>>>>>>>> order dim 1 laplacian dim order dim 1 boundary
>>>>>>>>>>>>>>>>> src/snes/examples/tutorials/ex12.h
>>>>>>>>>>>>>>>>> Traceback (most recent call last):
>>>>>>>>>>>>>>>>> File "bin/pythonscripts/PetscGenerateFEMQuadrature.py",
>>>>>>>>>>>>>>>>> line 15, in <module>
>>>>>>>>>>>>>>>>> from FIAT.reference_element import default_simplex
>>>>>>>>>>>>>>>>> ImportError: No module named FIAT.reference_element
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> I have removed the requirement of generating the header
>>>>>>>>>>>>>>>>> file (its now all handled in C). I thought
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> I changed the documentation everywhere (including the
>>>>>>>>>>>>>>>>> latest tutorial slides). Can you try running
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> with 'master' (or 'next'), and point me toward the old
>>>>>>>>>>>>>>>>> docs?
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Matt
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>>> What most experimenters take for granted before they begin
>>>>>>>>>>>>>>>>> their experiments is infinitely more interesting than any results to which
>>>>>>>>>>>>>>>>> their experiments lead.
>>>>>>>>>>>>>>>>> -- Norbert Wiener
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>> What most experimenters take for granted before they begin
>>>>>>>>>>>>>>>> their experiments is infinitely more interesting than any results to which
>>>>>>>>>>>>>>>> their experiments lead.
>>>>>>>>>>>>>>>> -- Norbert Wiener
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>> What most experimenters take for granted before they begin
>>>>>>>>>>>>>>> their experiments is infinitely more interesting than any results to which
>>>>>>>>>>>>>>> their experiments lead.
>>>>>>>>>>>>>>> -- Norbert Wiener
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> --
>>>>>>>>>>>>>> What most experimenters take for granted before they begin
>>>>>>>>>>>>>> their experiments is infinitely more interesting than any results to which
>>>>>>>>>>>>>> their experiments lead.
>>>>>>>>>>>>>> -- Norbert Wiener
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> --
>>>>>>>>>>>>> What most experimenters take for granted before they begin
>>>>>>>>>>>>> their experiments is infinitely more interesting than any results to which
>>>>>>>>>>>>> their experiments lead.
>>>>>>>>>>>>> -- Norbert Wiener
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> --
>>>>>>>>>>>> What most experimenters take for granted before they begin
>>>>>>>>>>>> their experiments is infinitely more interesting than any results to which
>>>>>>>>>>>> their experiments lead.
>>>>>>>>>>>> -- Norbert Wiener
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>>> What most experimenters take for granted before they begin their
>>>>>>>>>>> experiments is infinitely more interesting than any results to which their
>>>>>>>>>>> experiments lead.
>>>>>>>>>>> -- Norbert Wiener
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> What most experimenters take for granted before they begin their
>>>>>>>>>> experiments is infinitely more interesting than any results to which their
>>>>>>>>>> experiments lead.
>>>>>>>>>> -- Norbert Wiener
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> What most experimenters take for granted before they begin their
>>>>>>>> experiments is infinitely more interesting than any results to which their
>>>>>>>> experiments lead.
>>>>>>>> -- Norbert Wiener
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> *Miguel Angel Salazar de Troya*
>>>>>>> Graduate Research Assistant
>>>>>>> Department of Mechanical Science and Engineering
>>>>>>> University of Illinois at Urbana-Champaign
>>>>>>> (217) 550-2360
>>>>>>> salaza11 at illinois.edu
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> What most experimenters take for granted before they begin their
>>>>>> experiments is infinitely more interesting than any results to which their
>>>>>> experiments lead.
>>>>>> -- Norbert Wiener
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> *Miguel Angel Salazar de Troya*
>>>>> Graduate Research Assistant
>>>>> Department of Mechanical Science and Engineering
>>>>> University of Illinois at Urbana-Champaign
>>>>> (217) 550-2360
>>>>> salaza11 at illinois.edu
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> What most experimenters take for granted before they begin their
>>>> experiments is infinitely more interesting than any results to which their
>>>> experiments lead.
>>>> -- Norbert Wiener
>>>>
>>>
>>>
>>>
>>> --
>>> *Miguel Angel Salazar de Troya*
>>> Graduate Research Assistant
>>> Department of Mechanical Science and Engineering
>>> University of Illinois at Urbana-Champaign
>>> (217) 550-2360
>>> salaza11 at illinois.edu
>>>
>>>
>>
>>
>> --
>> What most experimenters take for granted before they begin their
>> experiments is infinitely more interesting than any results to which their
>> experiments lead.
>> -- Norbert Wiener
>>
>
>
>
> --
> *Miguel Angel Salazar de Troya*
> Graduate Research Assistant
> Department of Mechanical Science and Engineering
> University of Illinois at Urbana-Champaign
> (217) 550-2360
> salaza11 at illinois.edu
>
>
--
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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