# Unable to load high-resolution Nek5000 files

**URL:** https://discourse.paraview.org/t/unable-to-load-high-resolution-nek5000-files/9741
**Category:** ParaView Support
**Tags:** vtk
**Created:** [June 6, 2022, 5:43am UTC](https://discourse.paraview.org/t/unable-to-load-high-resolution-nek5000-files/9741 "2022-06-06T05:43:38Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![cjacob](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/c/51bf81/32.png) [@cjacob](https://discourse.paraview.org/u/cjacob)
#### Post date: [June 6, 2022, 5:43am UTC](https://discourse.paraview.org/t/unable-to-load-high-resolution-nek5000-files/9741/1 "2022-06-06T05:43:38Z")

</div>

Dear ParaView community,

I have been using ParaView to visualize (Nek5000) CFD simulation data and recently hit on a problem when I attempted to load some high-resolution data files. Below is the error message:

```auto
  ERROR: In /home/buildslave/dashboards/buildbot/paraview-pvbinsdash-linux-shared-release_superbuild/build/superbuild/paraview/src/VTK/Common/Core/vtkGenericDataArray.txx, line 452
vtkIdTypeArray (0x7efc2322a600): Unable to allocate -2087654656 elements of size 8 bytes.

ERROR: In /home/buildslave/dashboards/buildbot/paraview-pvbinsdash-linux-shared-release_superbuild/build/superbuild/paraview/src/Utilities/VisItBridge/databases/AvtAlgorithms/vtkAvtSTMDFileFormatAlgorithm.cxx, line 555

vtkVisItNek5000Reader (0x7efcf5288810): VisIt Exception caught.

ERROR: In /home/buildslave/dashboards/buildbot/paraview-pvbinsdash-linux-shared-release_superbuild/build/superbuild/paraview/src/VTK/Common/Core/vtkGenericDataArray.txx, line 452

vtkIdTypeArray (0x7efcf60da6b0): Unable to allocate -2087654656 elements of size 8 bytes.

ERROR: In /home/buildslave/dashboards/buildbot/paraview-pvbinsdash-linux-shared-release_superbuild/build/superbuild/paraview/src/Utilities/VisItBridge/databases/AvtAlgorithms/vtkAvtSTMDFileFormatAlgorithm.cxx, line 555

vtkVisItNek5000Reader (0x7efcee1b0cd0): VisIt Exception caught.

Nothing to export, use Catalyst Export Inspector to configure what you want to write.

ERROR: In /home/buildslave/dashboards/buildbot/paraview-pvbinsdash-linux-shared-release_superbuild/build/superbuild/paraview/src/VTK/Common/Core/vtkGenericDataArray.txx, line 452

vtkIdTypeArray (0x7efc238e0a40): Unable to allocate -2087654656 elements of size 8 bytes.

ERROR: In /home/buildslave/dashboards/buildbot/paraview-pvbinsdash-linux-shared-release_superbuild/build/superbuild/paraview/src/Utilities/VisItBridge/databases/AvtAlgorithms/vtkAvtSTMDFileFormatAlgorithm.cxx, line 555

vtkVisItNek5000Reader (0x7efcef09af60): VisIt Exception caught.

```

I found the below discussion in one of the previous posts and it has been marked as the accepted solution. But I am not sure where to implement it. Any remedial suggestions would be highly appreciated.

> [@Inconsistent memory behavior in Catalyst](https://discourse.paraview.org/t/inconsistent-memory-behavior-in-catalyst/2444):
>
> I have implemented Catalyst into a Fortran-MPI research code. For now I am using the writers to write out reduced data sets like plotOverLine and Slices for visualization and analysis later. I have built ParaVeiw 5.6.1 from source and that has all gone well. The issue I am running into is, at random intervals, ParaView throwing ERROR: In ParaView/VTK/Common/Core/vtkGenericDataArray.txx, line 452 vtkIdTypeArray (0x2aab12f03e40): Unable to allocate XXXXX elements of size 8 bytes. This happen…

Chinthaka.