[monika_1387]

I had the same issue from my LES results. So I generated my small size vtk from restart.dat file in MATLAB because my system freeze whenever I tried opening .vtu files from LES data dumped from SU2 code. So may be its just issue with code.

Originally Posted by Situla

Hello!


So I have been struggling for a while now trying to open my vtu files in Paraview. The error I get is this:

ERROR: In C:\bbd\ecd3383f\build\superbuild\paraview\src\VTK\ IO\XML\vtkXMLUnstructuredDataReader.cxx, line 657 vtkXMLUnstructuredGridReader (0000024E05BE8EC0): Cannot read cell connectivity from Cells in piece 0 because the "offsets" array is not monotonically increasing or starts with a value other than 0.

I obtained this vtu file by running CFD_SOL on my solution_flow.dat, which I again obtained from renaming the restart_flow.dat that is written at the end of the simulation.
This is the second (and very small) of four vtu files of a multi-physics problem (gas flow past three warm cylinders).
Most sense I can make of the error is by opening the vtu file in Notepad++, where I found these three lines:
<Cells>
<DataArray type="Int32" Name="connectivity" NumberOfComponents= "1" offset="1816" format="appended"/>
<DataArray type="Int32" Name="offsets" NumberOfComponents= "1" offset="3452" format="appended"/>


I am not sure if this "offset" variable is the same as in the error message, but it is clearly not 0.
This is my first multi-physics SU2 simulation, so I am not very experienced with how to deal with this.

I have attached the entire vtu-file and the mesh file.


Thank you for your time!
Martin




Edit: Above error appears with Paraview 5.8.0. I have tried opening this same exact file in Paraview 5.6.1, where I find a similar yet different error:


ERROR: In C:\bbd\ecd3383f\build\superbuild\paraview\src\VTK\ IO\XML\vtkXMLUnstructuredDataReader.cxx, line 616 vtkXMLUnstructuredGridReader (000001D73D38B500): Cannot read cell connectivity from Cells in piece 0 because the "offsets" array is not monotonically increasing or starts with a value less than 1.



What strikes me as bizarre is that in this version, Paraview seems to expect an array starting value > 0, whereas in the newer version, it seems Paraview would accept ONLY 0 as starting value. Clearly, there is not a value that can satisfy both conditions, which raises two questions: What value does it really need to be, and what value does my file have?




Edit2: added MWE

[rn86j]

I guess it won't be too long before SU2 7.0.7 appears !!
Thanks

[ehsanizadi]

Hi,

I am trying to open a large VTU file using Paraview. There are around 400000 unstructured data points in it. But in Paraview when I want to open it I get the following error:
"cannot read cell offsets from cells in piece 0 because the offset"

I tried Paraview versions 5.5, 5.6, 5.7, 5.8 & 5.9 on two different versions of Ubuntu and on Windows, but the error is the same.

I have also tried installing SU2, but it did not work for me. Also, I tried pasting the following into my configuration file: OUTPUT_FILES= PARAVIEW_ASCII, however, it did not solve my problem either.

I appreciate any help.
Thanks
E30

[rn86j]

May be try the the latest versions 7.1... onwards of SU2
Some of the earlier versions had issues in the vtu files

[Sakun]

Originally Posted by ddubey01

I've had this same problem in the past, and I solved by pasting the following into my configuration file: OUTPUT_FILES= PARAVIEW_ASCII

Upon adding this to your configuration file and running it, a working .vtk file should be outputted and ready for visualization on Paraview.

This actually worked, Thanks