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 t8fann...@gmail.com
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