Error in CGNSWriter

ParaView Support
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1

Hi,
I have a not so large EnSight Gold multiblock file (~9M cells). I have been trying to read it, perform some simple computations and then resave the data in CGNS. Whether I use (multiple instances of) a pvserver or a standalone Paraview client, upon saving I get the following errors:

 [paraview        ] vtkMPICommunicator.cxx:205   WARN| This operation not yet supported for more than 2147483647 objects
( 481.378s) [paraview        ]       vtkExecutive.cxx:741    ERR| vtkPVCompositeDataPipeline (0x73e7b920): Algorithm vtkPCGNSWriter (0x3901b5e0) returned failure for request: vtkInformation (0x73e7bff0)
  Debug: Off
  Modified Time: 432928170
  Reference Count: 1
  Registered Events: (none)
  Request: REQUEST_DATA
  FROM_OUTPUT_PORT: -1
  ALGORITHM_AFTER_FORWARD: 1
  FORWARD_DIRECTION: 0

The error seems similar to this MPI Integer Limit Error, even though I don’t see why it should invoke a MPICommunicator in a standalone Paraview client (the writer seems also to be vtkPCGNSWriter, not sure why the parallel one is invoked). Any ideas?

2

I believe that VTK was recently updated to support the larger ID space at least when the MPI implementation supports it (MPICH 4.1+).

Cc: @aron.helser @MicK7

3

Why would a standalone Paraview client be bothered with MPI anyway?

4

Local testing to see if the data is being split properly at least is at least one option. Some filters may also be parallelized over MPI but not threads.