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<div class="moz-cite-prefix">Hi Hong,<br>
<br>
It looks like you've found a bug in ParaView, there probably
should be a check preventing this division when the render window
is empty. However, it's likely a non issue when FPEs are disabled,
which I believe is the default. Could you search the vtkPVConfig.h
file (found in build/install dir) for PARAVIEW_ENABLE_FPE? If this
is defined during the build then PV will enable FPE's when it
starts. If that's the case in your build, then a quick fix for you
would be to rebuild with that feature disabled. If that's not the
case in your build, FPE's must be being enabled by a library
that's being linked in. You may have to inquire about this with
your sys admins, if they know of any such library.<br>
<br>
Burlen<br>
<br>
On 02/27/2013 10:01 AM, Hong Yi wrote:<br>
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<p class="MsoNormal"><span style="color:#1F497D">OK, now I know
why the floating point exception is raised after looking at
the values of those variables and the source code.
Specifically, the whole statement it fails is actually the
following:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Vx = 2.0 *
(this->DisplayPoint[0] - sizex * Viewport[0])/</span><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">(sizex*(this->Viewport[2]-this->Viewport[0]))
- 1.0,</span><span style="color:#1F497D"> where the
denominator has a value of 0 when it fails: sizex = 0,
this->Viewport[2]=1, and this->Viewport[0]=0, which
results in “divide by zero” floating point exception. The
key here is the sizex value which should not be zero, and
sizex is equal to the first component of
this->VTKWindow->GetSize(). So this VTKWindow gets a
size of zero which results in this floating point exception.
I am puzzled on why this could be the case since other
filters like isocontouring does not have this problem.
Hopefully someone in the list could provide some insight on
this problem.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Hong<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a class="moz-txt-link-abbreviated" href="mailto:paraview-bounces@paraview.org">paraview-bounces@paraview.org</a>
[<a class="moz-txt-link-freetext" href="mailto:paraview-bounces@paraview.org">mailto:paraview-bounces@paraview.org</a>]
<b>On Behalf Of </b>Hong Yi<br>
<b>Sent:</b> Wednesday, February 27, 2013 12:26 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:paraview@paraview.org">paraview@paraview.org</a><br>
<b>Subject:</b> Re: [Paraview] floating point exception
error when doing slice filter (only happen when running
pvserver remotely in parallel)<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">Just
some follow-up information I hope to shed some light on
this problem. I used pdb to debug pvserver running with
mpirun on the server and found this floating point
exception error happens on the line below:<br>
<br>
Program received signal SIGFPE, Arithmetic exception.<br>
0x00002ad33e95021b in vtkViewport::DisplayToView
(this=0x43a2670)<br>
at
/home/hyi2/Download/ParaView-3.14.1-Source/VTK/Filtering/vtkViewport.cxx:204<br>
204
(sizex*(this->Viewport[2]-this->Viewport[0])) - 1.0;<br>
<br>
which puzzles me since I cannot imagine why this could
cause floating point exception (I cannot see possibility
of "divide by zero" or other possible arithmetic
exception). I did try to check or uncheck "Remote Render
Threshold" checkbox both ways which results in the same
failure in the same statement as noted above. Also,
isocontouring filter runs fine with correct visual output,
but slicing and clipping filters result in same errors as
noted above.<br>
<br>
Hope this additional debug info could shed some light and
trigger some idea on what could be the problem. Perhaps
there is a possibility it is NVidia driver related? But in
my configuration, HPC server uses MESA software rendering
and my client NVidia driver is up to date with Geforce
GTX580 graphics card. <br>
<br>
Thanks for any ideas on what could cause this problem!<br>
<br>
Hong <br>
<br>
<o:p></o:p></span></p>
<div>
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align="center"><span
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Roman","serif";color:black">
<hr size="2" width="100%" align="center">
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<div id="divRpF39872">
<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">
<a moz-do-not-send="true"
href="mailto:paraview-bounces@paraview.org">paraview-bounces@paraview.org</a>
[<a class="moz-txt-link-abbreviated" href="mailto:paraview-bounces@paraview.org">paraview-bounces@paraview.org</a>] on behalf of Hong Yi
[<a class="moz-txt-link-abbreviated" href="mailto:hongyi@renci.org">hongyi@renci.org</a>]<br>
<b>Sent:</b> Friday, February 22, 2013 12:27 PM<br>
<b>To:</b> <a moz-do-not-send="true"
href="mailto:paraview@paraview.org">paraview@paraview.org</a><br>
<b>Subject:</b> [Paraview] floating point exception
error when doing slice filter (only happen when
running pvserver remotely in parallel)</span><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<p class="MsoNormal"><span style="color:black">I built
ParaView server with MPI on a HPC cluster with
OSMesa support since the cluster does not have
graphics hardware. The MPI compiler used to build
ParaView is mpich2/gnu412x64/1.4-shared. Paraview
server built successfully on the cluster without any
error. I can successfully connect to the pvserver
running on multiple nodes remotely via Paraview
client running on my local desktop, load data in,
and do gradient and vorticity computation, and look
at isosurfaces without problems. However, when I do
slice filter to look at one slice, as soon as I
click on slice filter, pvserver aborts with floating
point exception error. It is not the data problem
because I can do slice filter without problem for
the same data if I run builtin Paraview
server/client locally, so the problem only occurs
when the local client connects to pvserver running
remotely on multiple nodes (or on one node) via
mpirun. So far, the slice filter is the only filter
I have run into with this floating point exception
error raised by the remote pvserver. The other
filters such as gradient of unstructured data,
calculator of vorticity, isocontour all run
successfully with correct results produced. Any idea
on what could cause this problem is very much
appreciated!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Hong<o:p></o:p></span></p>
</div>
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