[Paraview] Paraview crashing when clipping an openfoam solution

Mon Mar 26 16:13:40 EDT 2018

Thanks Joachim,

I suspected it was more interesting than “just” a program bug. 

> El 26 mar 2018, a las 21:39, Joachim Pouderoux <joachim.pouderoux at kitware.com> escribió:
> 
> 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
> 
> 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
>>> 
>>> 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
>>>>> 
>>>>> 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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