[Paraview] Paraview Not Reading Some Fields in Dataset

Andy Bauer andy.bauer at kitware.com
Tue Jan 30 15:24:21 EST 2018


It looks like you have integer overflow (
https://en.wikipedia.org/wiki/Integer_overflow). I'd suggest using a
datatype with more precision and see if that fixes the issue.

On Tue, Jan 30, 2018 at 3:15 PM, Tate Fanning <t8fanning at gmail.com> wrote:

> 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 <(203)%20657-8480>" />
>          <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 <(360)%20953-7457>
> t8fanning at gmail.com
>
>
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