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I have written a new class, inherited from vtkStreamTracer. Till know I was using vtk-5.2 and everything was working well.<br>I now use the version of VTK contained in the ParaView-3.6.1 release and I get the following error:<br><br>ERROR: In /usr/local/ParaView-3.6.1/VTK/Filtering/vtkDemandDrivenPipeline.cxx, line 803<br>vtkCompositeDataPipeline (0x452cd80): Input for connection index 0 on input port index 0 for algorithm vtkStreamPlacer(0x452c3f0) is NULL, but a vtkDataObject is required.<br><br>I did not change anything, I still have a vtkMyTracer and I connect it to a reader as follows:<br><br>myTracer->SetInputConnection(reader->GetOutputPort());<br><br>So any idea of what has changed from vtk-5.2 to the current version?<br><br>                                            <br /><hr />Gratuit : Hotmail plus rapide avec Internet Explorer 8 ! <a href='http://www.microsoft.com/france/windows/products/winfamily/ie/ie8/msn/default.aspx' target='_new'>Cliquez ici !</a></body>
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