[Paraview] Attempting to run Catalyst CFullExample
Bill Sherman
shermanw at indiana.edu
Wed May 29 11:36:22 EDT 2013
Hello again Lucas (and ParaView community),
> I just wanted to explain why the program runs for a moment and then returns
> the prompt if you did not provide the script as an argument like you described
> in your first email. Providing the script as an argument is the correct way to
> execute the program. Since you didn't get any errors running the program without
> the script, the C portion of the program is OK.
Okay.
>> I'm not quite sure what you mean by "ParaView versions of the python
>> script".
>
> What I mean is that the version of ParaView which generated the script must be
> the same as the version of ParaView that you are running and using in your compiler.
> I think Andy was using the latest git version of ParaView in generating his scripts.
> So, if his examples are dated May 13, a version of ParaView around that date would
> be better to use. Yours is a clone in April and a lot of work was being done around
> then for Catalyst. I have been working on Fortran versions and I know I had to
> download and rebuild ParaView quite frequently.
Make sense.
> I do know the latest git clone does not work with those scripts because the
> repository has been updated to 4.0, as that is what I have and I tried it.
Okay, yesterday I downloaded and compiled a git clone (which calls itself
4.0.0 RC-2.
> I would first try to export a script from your version of ParaView. Make sure
> the CoProcessing plugin is loaded and then you should be able to export the state.
> You will need to modify the code to write the data to an output file and then open
> that in ParaView and create a pipeline that you want the CoProcessor to generate.
> You can then export the state through the plugin. This will generate a python script
> that you can use in place of the sample provided.
That would be good if there were a step-by-step tutorial that goes with the
examples, but I know that time (especially with the 4.0 release
preparations)
is tight. But w/o step-by-step, or at least a picture of what the pipeline
is supposed to look like, I'm not ready to be able to figure out how
to build the pipeline to match the example code.
> If that doesn't work, then you may might to rebuild to the latest ParaView and try
> exporting a script from that version. It is critical that the ParaView version used
> to generate the script is the same as the ParaView version used to compile the program.
So I'm hoping that the 4.0.0 RC-2 version will work with his examples.
> Andy will probably have some good suggestions as he is the primary Catalyst developer.
> He may even update those examples to ParaView 4.0 soon.
It looks like the examples on his github page haven't changed since I last
got them, so that's a good sign that things have stabilized:
- https://github.com/acbauer/CatalystExampleCode
> Also, these are all parallel examples so make sure you are using the correct mpiexec
> syntax. I know that was something I didn't realize the first time I tried these examples.
Hmmm, okay, so I'm not actually running in parallel, so that could also
be my problem. But I can report that with the current version of ParaView,
things now break in a different way -- no segfault, but I get some
python errors:
% ./FEDriver SampleScripts/feslicescript.py >& output
And now that you mention that this should be done in parallel:
% mpirun -np 2 ./FEDriver SampleScripts/feslicescript.py >& output
But that gives the same output!
% head output
Traceback (most recent call last):
File "<string>", line 2, in <module>
File "SampleScripts/feslicescript.py", line 12, in <module>
exec
vtkPVPythonCatalystPython.vtkCPPythonHelper.GetPythonHelperScript()
AttributeError: 'module' object has no attribute 'vtkCPPythonHelper'
Traceback (most recent call last):
File "<string>", line 2, in <module>
NameError: name 'feslicescript' is not defined
Traceback (most recent call last):
File "<string>", line 2, in <module>
NameError: name 'feslicescript' is not defined
And here's the beginning of that Python script:
% head -15 SampleScripts/feslicescript.py
# sample Python script for CxxFullExample. Run with:
# <FEDriver path>/FEDriver <path to this script>/feslicescript.py
try: paraview.simple
except: from paraview.simple import *
# Make sure the helper methods are loaded
try:
__cp_helper_script_loaded__
except:
import vtkPVPythonCatalystPython
exec vtkPVPythonCatalystPython.vtkCPPythonHelper.GetPythonHelperScript()
# Global variables that will hold the pipeline for each timestep
pipeline = None
> Hope this clarifies some thing,
Well, I definitely feel like I'm learning things. But I'm not quite
all the way there yet.
> Lucas
Thanks for moving me forward,
Bill
>
> ________________________________________
> From: William Sherman [shermanw at indiana.edu]
> Sent: Monday, May 27, 2013 12:34 AM
> To: Pettey . Lucas
> Cc: ParaView list; William Sherman
> Subject: Re: [Paraview] Attempting to run Catalyst CFullExample
>
> Hello again,
>
>> The Catalyst C and C++ examples all require the python script
>> as an argument at run time. The Fortran example requires that
>> the script be in the same directory. So when you aren't giving
>> the script as an argument, the code is running but doesn't have
>> any information about what to co-process, and it exits doing nothing.
>
> I did provide the script as an argument (following the instructions
> at the top of the python script).
>
>> As for the seg fault, my guess is that the ParaView versions of
>> the python script and the one against which you are compiling
>> are different. I know they are different on mine and while I don't
>> get a seg fault, I get some errors about the VTK class structures.
>
> I'm not quite sure what you mean by "ParaView versions of the python
> script". I do know that when I compiled the simulation with the
> Catalyst code, I am pointing to the same version of ParaView that
> I'm running. I don't know how that correlates to python versions.
>
>> I would recommend also checking out the latest versions of the examples.
>> Andy has done a lot of work on them recently, so if they are even a few
>> weeks old, they might not work as expected. Also, you could just export
>> a new script with the PV version built on your system.
>
> Well, thought I was downloading his latest examples by grabbing
> them directly from his github page. Is there somewhere else to
> look for them? Most of the files are dated May 13, 2013.
>
>> I hope this points you in the right direction.
>
> Not yet, but if you could explain what you mean by the ParaView
> python version, that might shed some light. I know I'm using the
> same version of ParaView.
>
>> Lucas Pettey
>
> Thanks for the suggestions,
> Bill
>
>> ________________________________________
>> From: paraview-bounces at paraview.org [paraview-bounces at paraview.org] on behalf of Bill Sherman [shermanw at indiana.edu]
>> Sent: Friday, May 24, 2013 6:56 PM
>> To: ParaView list
>> Cc: Bill Sherman
>> Subject: [Paraview] Attempting to run Catalyst CFullExample
>>
>> Hello,
>>
>> I'm in the process of attempting to learn how to use the Catalyst
>> feature of ParaView, and I have a problem.
>>
>> I found the sample code on github:
>> - https://github.com/acbauer/CatalystExampleCode
>>
>> and I began by compiling the "CFullExample" application.
>>
>> There is some weirdness when trying to compile the application
>> as a non-Catalyst simulation, but since I'm trying to learn
>> Catalyst, that's just an aside to the code maintainers.
>>
>> So I have the application (FEDriver) compiled, and there is
>> a sample python script. I ran ParaView (same version as I
>> used when compiling FEDriver -- a git clone from April),
>> and I start the Catalyst connection:
>> -> Tools -> Connect to Catalyst
>>
>> (which I had to find by poking around, the SC'12 Catalyst
>> tutorial doesn't seem to mention this -- or not that I noticed.
>> An aside to the code documenters.)
>>
>> So I followed the instructions in the python script, and
>> with ParaView accepting Catalyst connections on port 22222,
>> this is what happens:
>> % ./FEDriver SampleScripts/feslicescript.py
>> Segmentation fault (core dumped)
>>
>> Actually, that happens regardless of whether ParaView is running
>> or not, but it only happens when I give the python script as an
>> argument -- w/o the script, it runs for a moment and then returns
>> to the prompt.
>>
>> So what am I missing?
>>
>> Thanks,
>> Bill
>>
>> --
>> Bill Sherman
>> Sr. Technology Advisor
>> Advanced Visualization Lab
>> Pervasive Technology Inst
>> Indiana University
>> shermanw at indiana.edu
>>
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