[vtkusers] vtkExtractSelection returned failure for request: vtkInformation ???

[Biddiscombe, John A.]

Put a breakpoint in RequestDataObject and see why it is failing. For some reason it can't create the correct output data type. Most likely there is a null input and the output changes type depending on input type....

From: vtk-developers-bounces at vtk.org [mailto:vtk-developers-bounces at vtk.org] On Behalf Of Andreas Buykx
Sent: 28 September 2011 09:37
To: vtk-developers at vtk.org; vtkusers at vtk.org
Subject: [vtk-developers] vtkExtractSelection returned failure for request: vtkInformation ???

Hi all,

My pipelines produce the following error messages:

ERROR: In /usr4/tmp/3rdPartyStuff/build/builds/vtk-5.8.0-source/Filtering/vtkExecutive.cxx, line 753
vtkStreamingDemandDrivenPipeline (0x2279700): Algorithm vtkExtractSelection(0x222b820) returned failure for request: vtkInformation (0x2286070)
  Debug: Off
  Modified Time: 38327
  Reference Count: 1
  Registered Events: (none)
  Request: REQUEST_DATA_OBJECT
  ALGORITHM_AFTER_FORWARD: 1
  FORWARD_DIRECTION: 0
  FROM_OUTPUT_PORT: 0

What does this mean? Each of my pipelines has a vtkExtractSelection as first component. The pipelines that produce this message are embedded in a pipeline class that is used throughout my product. I have several groups of instances of these pipeline classes and only one group produces the messages. and its input connection is always a data set (a vtkUnstructuredGrid or a vtkPolyData). The output port is connected to either a vtkAlgorithm input or to a vtkMapper. I have tried the debug output of the input data sets and the vtkExtractSelection filters, but this didn't really help.

Thanks for your help!
Andreas Buykx
Senior Software Engineer

TNO DIANA BV
Software Developers and Analysis Consultants for Civil and Geotechnical Engineering

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