I think you're missing a seed for the particle flow paths. You can use something under the sources menu to create that to seed the initial points for the particle tracker filter. When the Change Input Dialog window comes up after you're created the particle paths filter, click on Seed Source and then choose an input for your seeds.<br>
<br>Andy<br><br><div class="gmail_quote">On Tue, Feb 26, 2013 at 8:53 PM, Uriel Zajaczkovski <span dir="ltr"><<a href="mailto:uzajaczk@ucsd.edu" target="_blank">uzajaczk@ucsd.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Dear Paraview community,<br>
<br>
I'm trying to use the ParticleTracer filter (PV 3.98.1) on a 3-D velocity field (computed via the calculator filter as U*iHat+V*jHat+0*kHat).<br>
<br>
I get this error (and PV crashes if I go ahead and apply the filter anyway):<br>
<br>
ERROR: In /Users/kitware/Dashboards/MyTests/NightlyMaster/ParaViewSuperbuild-Release/paraview/src/paraview/VTK/Common/ExecutionModel/vtkDemandDrivenPipeline.cxx, line 716<br>
vtkPVCompositeDataPipeline (0x10c1143a0): Input port 1 of algorithm vtkPParticleTracer(0x10c11f320) has 0 connections but is not optional.<br>
<br>
Any ideas of what I'm doing wrong?<br>
<br>
Cheers,<br>
Uriel<br>
<br>
<br>
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