[Paraview] Paraview crashing when clipping an openfoam solution

[Joachim Pouderoux]

Crashes did not occur all the time. It depends on the cell
geometry/topology and the slice origin/normal.

*Joachim Pouderoux*, PhD

*Technical Expert - Scientific Computing Team*
*Kitware SAS <http://www.kitware.fr>*


2018-03-26 15:14 GMT-04:00 Carlos E Manglano-Villamarin <
carlosemanglanov at gmail.com>:

> Quite interestingly, I have just create a 2D slice in a mesh with 947443
> cells, and it has not crashed!! It is showing the "holes" you mentioned
> before, though. This is puzzling me, some meshes make PV to crash, and
> others just show the bug you mentiones :-/
>
> C.
>
> 2018-03-26 21:07 GMT+02:00 Joachim Pouderoux <
> joachim.pouderoux at kitware.com>:
>
>> Carlos,
>>
>> For information, here is the merge request that address the wedge issue:
>>   https://gitlab.kitware.com/vtk/vtk/merge_requests/4059
>> This is a simple patch for now, better solution will come.
>>
>> Joachim
>>
>> *Joachim Pouderoux*, PhD
>>
>> *Technical Expert - Scientific Computing Team*
>> *Kitware SAS <http://www.kitware.fr>*
>>
>>
>> 2018-03-26 15:04 GMT-04:00 Carlos E Manglano-Villamarin <
>> carlosemanglanov at gmail.com>:
>>
>>> Thanks Joachim,
>>>
>>> I'll give it a go!
>>>
>>> C.
>>>
>>> 2018-03-26 20:36 GMT+02:00 Joachim Pouderoux <
>>> joachim.pouderoux at kitware.com>:
>>>
>>>> Carlos,
>>>>
>>>> OpenFOAM can produce cells with non planar faces which is not handled
>>>> by VTK/ParaView. Moreover it appears that current reader implementation can
>>>> also produce incorrect cells when reading wedge cells.
>>>> Thanks to a recent rewriting of the polydron clipping algorithm, the
>>>> clipping/slicing of polyhedron should no more lead to crashes. However,the
>>>> problems
>>>> of non planar faces might produce some holes in the result.
>>>> We are currently working on a patch to better handle this case in the
>>>> reader.
>>>> If you want to try the new polyhedron  clipping algorithm, you will
>>>> have to use ParaView >= 5.5 RC1.
>>>>
>>>> Best regards,
>>>> Joachim
>>>>
>>>>
>>>> *Joachim Pouderoux*, PhD
>>>>
>>>> *Technical Expert - Scientific Computing Team*
>>>> *Kitware SAS <http://www.kitware.fr>*
>>>>
>>>>
>>>> 2018-03-26 14:29 GMT-04:00 Carlos E Manglano-Villamarin <
>>>> carlosemanglanov at gmail.com>:
>>>>
>>>>> It's me again, I'm sorry,
>>>>>
>>>>> Problem NOT solved!!! ... Hardware looks ok, software and system
>>>>> handling memory looks good too.
>>>>>
>>>>> ParaView shuts down if I try to generate a clip with the "VTK
>>>>> Polyhedron" option selected, before and after clipping ...
>>>>>
>>>>> possible bug??
>>>>>
>>>>> C.
>>>>>
>>>>> 2018-03-26 16:51 GMT+02:00 Shawn Waldon <shawn.waldon at kitware.com>:
>>>>>
>>>>>> Hi Carlos,
>>>>>>
>>>>>> That error message means that an exception was thrown from a Qt event
>>>>>> handler.  The message about reimplementing QApplication::notify() is just
>>>>>> to tell you how to catch the exception if you wanted to.  The real problem
>>>>>> is the exception.
>>>>>>
>>>>>> A std::bad_alloc exception happens when the program tries to allocate
>>>>>> memory and fails.  So you need to figure out why you are running out of
>>>>>> memory (that is the most likely cause of the error).
>>>>>>
>>>>>> HTH,
>>>>>> Shawn
>>>>>>
>>>>>> On Mon, Mar 26, 2018 at 10:47 AM, Carlos E Manglano-Villamarin <
>>>>>> carlosemanglanov at gmail.com> wrote:
>>>>>>
>>>>>>> Hi everyone!
>>>>>>>
>>>>>>> When I postprocess some simulations, less than 900,000 cells, from
>>>>>>> openfoam, either opening paraview directly or using the parafoam tool, the
>>>>>>> program crashes giving me the following error message:
>>>>>>>
>>>>>>> I/O    : uncollated
>>>>>>> terminate called after throwing an instance of 'std::bad_alloc'
>>>>>>>   what():  std::bad_alloc
>>>>>>> Qt has caught an exception thrown from an event handler. Throwing
>>>>>>> exceptions from an event handler is not supported in Qt. You must
>>>>>>> reimplement QApplication::notify() and catch all exceptions there.
>>>>>>>
>>>>>>> My OS is Ubuntu 16.04, freshly installed. I was getting the same
>>>>>>> error with Ubuntu 17.10 which I had installed until last night.
>>>>>>>
>>>>>>> I am looking for info about "reimplementing QApplication" with no
>>>>>>> luck.
>>>>>>>
>>>>>>> Any suggestions, please?
>>>>>>> Carlos
>>>>>>>
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>>>>>>
>>>>>
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>>>>>
>>>>
>>>
>>
>
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