# vtkPExodusIIReader gives no outputs

**URL:** https://discourse.kitware.com/t/vtkpexodusiireader-gives-no-outputs/1470
**Category:** Uncategorized
**Created:** [March 5, 2025, 2:36pm UTC](https://discourse.kitware.com/t/vtkpexodusiireader-gives-no-outputs/1470 "2025-03-05T14:36:10Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![mattfalcone](https://discourse.kitware.com/letter_avatar_proxy/v4/letter/m/e5b9ba/32.png) [@mattfalcone](https://discourse.kitware.com/u/mattfalcone)
#### Post date: [March 5, 2025, 2:36pm UTC](https://discourse.kitware.com/t/vtkpexodusiireader-gives-no-outputs/1470/1 "2025-03-05T14:36:10Z")

</div>

I am trying to read the can.e.4.\* Parallel Exodus II files in the VTKData tar ball using the the vtkPExodusIIReader. It seems that the reader recognises which files needs to be read and returns without error. However, the reader does not recognise the blocks and arrays that should be part of that file. The returned vtkMultiBlockDataset appears empty and not that I am able to use the vtkExodusIIReader on each of the 4 files. I am not sure what I have missed. I have attached my effort below, noting that it includes some `pyvista` to streamline the visualisation.

```python3
import vtk

from pyvista import MultiBlock
def main():
    controller = vtk.vtkDummyController()
    vtk.vtkDummyController.SetGlobalController(controller)

    reader = vtk.vtkPExodusIIReader()
    reader.SetFilePattern(r"%s.e.4.%d")
    reader.SetFilePrefix("can")
    reader.SetFileRange(0,3)
    reader.UpdateInformation()

    print(reader.GetNumberOfElementResultArrays())
    print(reader.GetNumberOfFiles())
    print(reader.GetTotalNumberOfElements())

    reader.SetPointResultArrayStatus("temp", 1)

    tstep = reader.GetNumberOfTimeSteps() - 1
    reader.SetTimeStep(tstep)
    reader.Update()
    print(reader)
    data = MultiBlock(reader.GetOutputDataObject(0))
    print(data)
    print(data)
    data.plot()

if __name__ == ' __main__':
    main()

```

Thanks in advance!  
Matthew