[Paraview] Paraview Not Reading Some Fields in Dataset
Tate Fanning
t8fanning at gmail.com
Tue Jan 30 15:15:53 EST 2018
I've output a vtu file from a CFD code. When trying to load the dataset
into Paraview I get the following errors:
[CODE]Error reading uncompressed binary data header. Read 0 of 4 bytes.
ERROR: In
C:\bbd\7cc78367\source-paraview\VTK\IO\XMLParser\vtkXMLDataParser.cxx, line
609 vtkXMLDataParser (0000009CC7674520): Error reading uncompressed binary
data header. Read 0 of 4 bytes.
Cannot read point data array "Cyl_Velocity" from PointData in piece 0. The
data array in the element may be too short. ERROR: In
C:\bbd\7cc78367\source-paraview\VTK\IO\XML\vtkXMLDataReader.cxx, line 443
vtkXMLUnstructuredGridReader (0000009C837CFCE0): Cannot read point data
array "Cyl_Velocity" from PointData in piece 0. The data array in the
element may be too short.[/CODE]
If I ask Paraview to not read the offending arrays, it reads the other
arrays in fine. From these errors, it seems the data file has some issues
with a few specific arrays.
Upon inspection of the first part of the vtu file, the offending arrays
(Cyl_Velocity and Rel_Velocity) have negative offsets.
[CODE]<VTKFile type="UnstructuredGrid" version="0.1" byte_order="BigEndian">
<UnstructuredGrid>
<Piece NumberOfPoints=" 9855039" NumberOfCells=" 9523296">
<Points>
<DataArray type="Float64" Name="coordinates" NumberOfComponents="3"
format="appended" offset=" 0" />
</Points>
<Cells>
<DataArray type="Int32" Name="connectivity" format="appended"
offset=" 236520940" />
<DataArray type="Int32" Name="offsets" format="appended" offset="
541266416" />
<DataArray type="Int32" Name="types" format="appended" offset="
579359604" />
</Cells>
<PointData>
<DataArray type="Float64" Name="rho" format="appended" offset="
617452792" />
<DataArray type="Float64" Name="P" format="appended" offset="
696293108" />
<DataArray type="Float64" Name="Phi" format="appended" offset="
775133424" />
<DataArray type="Float64" Name="TKE" format="appended" offset="
853973740" />
<DataArray type="Float64" Name="EPS" format="appended" offset="
932814056" />
<DataArray type="Float64" Name="mut/mul" format="appended"
offset=" 1011654372" />
<DataArray type="Float64" Name="WDist" format="appended" offset="
1090494688" />
<DataArray type="Float64" Name="TimeStep" format="appended"
offset=" 1169335004" />
<DataArray type="Float64" Name="T" format="appended" offset="
1248175320" />
<DataArray type="Float64" Name="Processor" format="appended"
offset=" 1327015636" />
<DataArray type="Float64" Name="Soundspeed" format="appended"
offset=" 1405855952" />
<DataArray type="Float64" Name="Lam.Visc" format="appended"
offset=" 1484696268" />
<DataArray type="Float64" Name="Yplusw" format="appended"
offset=" 1563536584" />
<DataArray type="Float64" Name="Qdotw" format="appended" offset="
1642376900" />
<DataArray type="Float64" Name="vort-x" format="appended"
offset=" 1721217216" />
<DataArray type="Float64" Name="vort-y" format="appended"
offset=" 1800057532" />
<DataArray type="Float64" Name="vort-z" format="appended"
offset=" 1878897848" />
<DataArray type="Float64" Name="helicity" format="appended"
offset=" 1957738164" />
<DataArray type="Float64" Name="Velocity" NumberOfComponents="3"
format="appended" offset=" 2036578480" />
<DataArray type="Float64" Name="Cyl_Velocity"
NumberOfComponents="3" format="appended" offset=" -2021867876" />
<DataArray type="Float64" Name="Rel_Velocity"
NumberOfComponents="3" format="appended" offset=" -1785346936" />
</PointData>
<CellData> </CellData>[/CODE]
The CFD code also can output data files for a specific surface. When I load
one of those into Paraview, it has no issues with any data array in that
file, and everything works fine.
Upon inspection of the first part of a single surface vtu file with no
issues, no array has a negative offset.
[CODE] <VTKFile type="UnstructuredGrid" version="0.1"
byte_order="BigEndian">
<UnstructuredGrid>
<Piece NumberOfPoints=" 176025" NumberOfCells=" 174528">
<Points>
<DataArray type="Float64" Name="coordinates" NumberOfComponents="3"
format="appended" offset=" 0" />
</Points>
<Cells>
<DataArray type="Int32" Name="connectivity" format="appended"
offset=" 4224604" />
<DataArray type="Int32" Name="offsets" format="appended" offset="
7017056" />
<DataArray type="Int32" Name="types" format="appended" offset="
7715172" />
</Cells>
<PointData>
<DataArray type="Float64" Name="rho" format="appended" offset="
8413288" />
<DataArray type="Float64" Name="P" format="appended" offset="
9821492" />
<DataArray type="Float64" Name="Phi" format="appended" offset="
11229696" />
<DataArray type="Float64" Name="TKE" format="appended" offset="
12637900" />
<DataArray type="Float64" Name="EPS" format="appended" offset="
14046104" />
<DataArray type="Float64" Name="mut/mul" format="appended"
offset=" 15454308" />
<DataArray type="Float64" Name="WDist" format="appended" offset="
16862512" />
<DataArray type="Float64" Name="TimeStep" format="appended"
offset=" 18270716" />
<DataArray type="Float64" Name="T" format="appended" offset="
19678920" />
<DataArray type="Float64" Name="Processor" format="appended"
offset=" 21087124" />
<DataArray type="Float64" Name="Soundspeed" format="appended"
offset=" 22495328" />
<DataArray type="Float64" Name="Lam.Visc" format="appended"
offset=" 23903532" />
<DataArray type="Float64" Name="Yplusw" format="appended"
offset=" 25311736" />
<DataArray type="Float64" Name="Qdotw" format="appended" offset="
26719940" />
<DataArray type="Float64" Name="vort-x" format="appended"
offset=" 28128144" />
<DataArray type="Float64" Name="vort-y" format="appended"
offset=" 29536348" />
<DataArray type="Float64" Name="vort-z" format="appended"
offset=" 30944552" />
<DataArray type="Float64" Name="helicity" format="appended"
offset=" 32352756" />
<DataArray type="Float64" Name="Velocity" NumberOfComponents="3"
format="appended" offset=" 33760960" />
<DataArray type="Float64" Name="Cyl_Velocity"
NumberOfComponents="3" format="appended" offset=" 37985564" />
<DataArray type="Float64" Name="Rel_Velocity"
NumberOfComponents="3" format="appended" offset=" 42210168" />
</PointData>
<CellData> </CellData>[/CODE]
So I think the offset sign is relevant to my problem, but I don't really
know what it means or how to fix it. Does anyone know what I can do to fix
my data set, or at least know what the underlying problem is?
Thank you.
--
*Tate Fanning*
Ph.D. Candidate
Turbomachinery Research Lab
BYU Mechanical Engineering
360-953-7457
t8fanning at gmail.com
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