# ParaView-superbuild crashes when .nas files are opened. Problem with VisIt reader?
**URL:** https://discourse.paraview.org/t/paraview-superbuild-crashes-when-nas-files-are-opened-problem-with-visit-reader/1032
**Category:** Development
**Created:** [December 13, 2018, 8:59am UTC](https://discourse.paraview.org/t/paraview-superbuild-crashes-when-nas-files-are-opened-problem-with-visit-reader/1032 "2018-12-13T08:59:25Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@sabyasachi](https://discourse.paraview.org/u/sabyasachi)
#### Post date: [December 13, 2018, 8:59am UTC](https://discourse.paraview.org/t/paraview-superbuild-crashes-when-nas-files-are-opened-problem-with-visit-reader/1032/1 "2018-12-13T08:59:25Z")
Hello,
I have installed paraview with the superbuild procedure on a MacOS. My main use-case is to use paraview to read Nastran files. To do this, I have enabled VisIt reader by turning on “ENABLE\_visitbridge” during the build process.
However, Paraview seems to crash when I “open” the Nastran files. Is this a problem with the VisIt reader or a general bug in Paraview?
I am attaching some Nastran files for you to try out with your own versions:
[bulk.nas](https://discourse.paraview.org/uploads/default/original/1X/2d6fe36b2392e946e390bb70711f6ef9042f8139.nas) (330.0 KB)
[comwing-wing.nas](https://discourse.paraview.org/uploads/default/original/1X/1621b3430fb44f7fcd49ae77941786424d4c3d6d.nas) (158.1 KB)
[eb\_dyn.nas](https://discourse.paraview.org/uploads/default/original/1X/87f3b8624caa0f79dc6217480b8213f8bdb5a449.nas) (6.4 KB)
Please let me know what you think.
Best regards,
Sabyasachi
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### Author:  [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [December 13, 2018, 2:38pm UTC](https://discourse.paraview.org/t/paraview-superbuild-crashes-when-nas-files-are-opened-problem-with-visit-reader/1032/2 "2018-12-13T14:38:08Z")
Thanks for attaching the data and the bug report. It looks like a bug in the VisIt reader and/or an issue with the file:
```auto
=================================================================
==40921==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7fff5fbf2fc0 at pc 0x000122100470 bp 0x7fff5fbf2f50 sp 0x7fff5fbf2f48
WRITE of size 1 at 0x7fff5fbf2fc0 thread T0
#0 0x12210046f in Getf(char const*) avtNASTRANFileFormat.C:255
#1 0x1220f83be in avtNASTRANFileFormat::ReadFile(char const*, int) avtNASTRANFileFormat.C:432
#2 0x1220f6421 in avtNASTRANFileFormat::ActivateTimestep() avtNASTRANFileFormat.C:198
#3 0x121b5d550 in vtkVisItNASTRANReader::InitializeAVTReader(int const&) vtkVisItNASTRANReader.cxx:129
#4 0x121ac7c0b in vtkAvtFileFormatAlgorithm::InitializeAVTReader() vtkAvtFileFormatAlgorithm.h:112
#5 0x121aeba7d in vtkAvtSTSDFileFormatAlgorithm::RequestDataObject(vtkInformation*, vtkInformationVector**, vtkInformationVector*) vtkAvtSTSDFileFormatAlgorithm.cxx:84
#6 0x117a2ed9c in vtkCompositeDataSetAlgorithm::ProcessRequest(vtkInformation*, vtkInformationVector**, vtkInformationVector*) vtkCompositeDataSetAlgorithm.cxx:82
#7 0x121ab94a7 in vtkAvtFileFormatAlgorithm::ProcessRequest(vtkInformation*, vtkInformationVector**, vtkInformationVector*) vtkAvtFileFormatAlgorithm.cxx:170
#8 0x109a817cc in vtkFileSeriesReader::ProcessRequest(vtkInformation*, vtkInformationVector**, vtkInformationVector*) vtkFileSeriesReader.cxx:529
#9 0x117a4e79f in vtkExecutive::CallAlgorithm(vtkInformation*, int, vtkInformationVector**, vtkInformationVector*) vtkExecutive.cxx:773
```
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### Author:  [@sabyasachi](https://discourse.paraview.org/u/sabyasachi)
#### Post date: [December 13, 2018, 3:40pm UTC](https://discourse.paraview.org/t/paraview-superbuild-crashes-when-nas-files-are-opened-problem-with-visit-reader/1032/3 "2018-12-13T15:40:35Z")
Dear Cory,
Thanks for following-up on this.
I tried pyNastran which is an open-source tool for visualising nastran files in vtk format. All these files work perfectly in that (find attached an example screenshot).
So, it seems like a bug in the VisIt reader. Has this been reported before? What are the next steps you recommend to take now to get Nastran files working in ParaView?
Best regards,
Sabyasachi
---
### Author:  [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [December 13, 2018, 3:44pm UTC](https://discourse.paraview.org/t/paraview-superbuild-crashes-when-nas-files-are-opened-problem-with-visit-reader/1032/4 "2018-12-13T15:44:34Z")
If you could file a bug report at [https://gitlab.kitware.com/paraview/paraview/issues](https://gitlab.kitware.com/paraview/paraview/issues) that would be the next step. If someone in the community submits a patch that fixes it, we can get it integrated into ParaView. Otherwise, it will get fixed if a Kitware customer needs it at some point in the future.
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### Author:  [@sabyasachi](https://discourse.paraview.org/u/sabyasachi)
#### Post date: [December 13, 2018, 3:45pm UTC](https://discourse.paraview.org/t/paraview-superbuild-crashes-when-nas-files-are-opened-problem-with-visit-reader/1032/5 "2018-12-13T15:45:36Z")
Sure, thanks. I have filed a bug report on Gitlab here: [https://gitlab.kitware.com/paraview/paraview/issues/18668](https://gitlab.kitware.com/paraview/paraview/issues/18668)
Anyone interested can follow-up here and hopefully submit a fix 🙂
Have a good week!